/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 14:04:28,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 14:04:28,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 14:04:28,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-03 14:04:28,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-03 14:04:28,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-03 14:04:28,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-03 14:04:28,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-03 14:04:28,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-03 14:04:28,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-03 14:04:28,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-03 14:04:28,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-03 14:04:28,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 14:04:28,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 14:04:28,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 14:04:28,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 14:04:28,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 14:04:28,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 14:04:28,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 14:04:28,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 14:04:28,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 14:04:28,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 14:04:28,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 14:04:28,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 14:04:28,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-03 14:04:28,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-03 14:04:28,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-03 14:04:28,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-03 14:04:28,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-03 14:04:28,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-03 14:04:28,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-03 14:04:28,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-03 14:04:28,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-03 14:04:28,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-03 14:04:28,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-03 14:04:28,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-03 14:04:28,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-03 14:04:28,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-03 14:04:28,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 14:04:28,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 14:04:28,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 14:04:28,591 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 [2021-05-03 14:04:28,625 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 14:04:28,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 14:04:28,626 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 14:04:28,626 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 14:04:28,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 14:04:28,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 14:04:28,629 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 14:04:28,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 14:04:28,629 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 14:04:28,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 14:04:28,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 14:04:28,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 14:04:28,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 14:04:28,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 14:04:28,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 14:04:28,631 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 14:04:28,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 14:04:28,631 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 14:04:28,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 14:04:28,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 14:04:28,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 14:04:28,632 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 14:04:28,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 14:04:28,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:04:28,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 14:04:28,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 14:04:28,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 14:04:28,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 14:04:28,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 14:04:28,633 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 14:04:28,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 14:04:28,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 14:04:28,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 14:04:28,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 14:04:28,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 14:04:28,979 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 14:04:28,980 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 14:04:28,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl [2021-05-03 14:04:28,981 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl' [2021-05-03 14:04:29,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 14:04:29,034 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 14:04:29,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 14:04:29,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 14:04:29,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 14:04:29,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:29" (1/1) ... [2021-05-03 14:04:29,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:29" (1/1) ... [2021-05-03 14:04:29,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 14:04:29,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 14:04:29,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 14:04:29,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 14:04:29,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:29" (1/1) ... [2021-05-03 14:04:29,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:29" (1/1) ... [2021-05-03 14:04:29,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:29" (1/1) ... [2021-05-03 14:04:29,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:29" (1/1) ... [2021-05-03 14:04:29,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:29" (1/1) ... [2021-05-03 14:04:29,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:29" (1/1) ... [2021-05-03 14:04:29,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:29" (1/1) ... [2021-05-03 14:04:29,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 14:04:29,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 14:04:29,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 14:04:29,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 14:04:29,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:29" (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 [2021-05-03 14:04:29,148 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 14:04:29,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 14:04:29,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 14:04:29,149 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 14:04:29,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 14:04:29,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 14:04:29,149 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 14:04:29,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 14:04:29,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 14:04:29,150 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 14:04:29,351 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 14:04:29,351 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 14:04:29,352 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-05-03 14:04:29,353 INFO L202 PluginConnector]: Adding new model unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:04:29 BoogieIcfgContainer [2021-05-03 14:04:29,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 14:04:29,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 14:04:29,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 14:04:29,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 14:04:29,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:29" (1/2) ... [2021-05-03 14:04:29,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3d72f2 and model type unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 02:04:29, skipping insertion in model container [2021-05-03 14:04:29,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:04:29" (2/2) ... [2021-05-03 14:04:29,360 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.bpl [2021-05-03 14:04:29,382 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 14:04:29,382 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 14:04:29,386 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 14:04:29,386 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 14:04:29,434 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 14:04:29,469 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 14:04:29,485 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 14:04:29,485 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 14:04:29,485 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 14:04:29,485 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 14:04:29,485 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 14:04:29,485 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 14:04:29,486 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 14:04:29,486 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 14:04:29,493 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-05-03 14:04:29,501 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,503 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-03 14:04:29,507 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:29,508 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:29,508 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:29,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:29,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1485035801, now seen corresponding path program 1 times [2021-05-03 14:04:29,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:29,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72868210] [2021-05-03 14:04:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:29,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72868210] [2021-05-03 14:04:29,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:04:29,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:04:29,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123038778] [2021-05-03 14:04:29,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:04:29,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:29,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:04:29,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:04:29,776 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:29,824 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-05-03 14:04:29,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:04:29,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-05-03 14:04:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:29,833 INFO L225 Difference]: With dead ends: 26 [2021-05-03 14:04:29,833 INFO L226 Difference]: Without dead ends: 18 [2021-05-03 14:04:29,836 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:04:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-03 14:04:29,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-03 14:04:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-05-03 14:04:29,865 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-05-03 14:04:29,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:29,865 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-05-03 14:04:29,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,866 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-05-03 14:04:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-03 14:04:29,866 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:29,866 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:29,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 14:04:29,867 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:29,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:29,871 INFO L82 PathProgramCache]: Analyzing trace with hash -258877683, now seen corresponding path program 2 times [2021-05-03 14:04:29,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:29,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572951651] [2021-05-03 14:04:29,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:29,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572951651] [2021-05-03 14:04:29,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:04:29,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:04:29,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293241678] [2021-05-03 14:04:29,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:04:29,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:29,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:04:29,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:04:29,946 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:29,985 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-05-03 14:04:29,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:04:29,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-05-03 14:04:29,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:29,987 INFO L225 Difference]: With dead ends: 28 [2021-05-03 14:04:29,987 INFO L226 Difference]: Without dead ends: 23 [2021-05-03 14:04:29,989 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:04:29,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-03 14:04:29,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-05-03 14:04:29,996 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) [2021-05-03 14:04:29,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-05-03 14:04:29,997 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-05-03 14:04:29,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:29,997 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-05-03 14:04:29,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,998 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-05-03 14:04:29,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 14:04:29,998 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:29,998 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:29,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 14:04:29,999 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:29,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:30,000 INFO L82 PathProgramCache]: Analyzing trace with hash -2042651181, now seen corresponding path program 1 times [2021-05-03 14:04:30,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:30,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087235734] [2021-05-03 14:04:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:30,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087235734] [2021-05-03 14:04:30,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292242006] [2021-05-03 14:04:30,084 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 [2021-05-03 14:04:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:30,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:30,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:30,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 14:04:30,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:30,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:30,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:30,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-05-03 14:04:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:30,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:30,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-05-03 14:04:30,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802236812] [2021-05-03 14:04:30,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:04:30,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:30,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:04:30,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:04:30,379 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:30,431 INFO L93 Difference]: Finished difference Result 32 states and 58 transitions. [2021-05-03 14:04:30,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:04:30,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-03 14:04:30,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:30,432 INFO L225 Difference]: With dead ends: 32 [2021-05-03 14:04:30,432 INFO L226 Difference]: Without dead ends: 27 [2021-05-03 14:04:30,432 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:30,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-03 14:04:30,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-05-03 14:04:30,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 46 transitions. [2021-05-03 14:04:30,436 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 46 transitions. Word has length 11 [2021-05-03 14:04:30,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:30,436 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 46 transitions. [2021-05-03 14:04:30,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,437 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 46 transitions. [2021-05-03 14:04:30,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 14:04:30,437 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:30,437 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:30,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-03 14:04:30,653 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:30,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:30,653 INFO L82 PathProgramCache]: Analyzing trace with hash -413298669, now seen corresponding path program 2 times [2021-05-03 14:04:30,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:30,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340883046] [2021-05-03 14:04:30,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:30,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340883046] [2021-05-03 14:04:30,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330940110] [2021-05-03 14:04:30,687 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 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 [2021-05-03 14:04:30,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:30,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:30,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:30,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:30,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 14:04:30,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:30,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:30,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:30,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-05-03 14:04:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:30,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:30,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-05-03 14:04:30,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376594673] [2021-05-03 14:04:30,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:04:30,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:30,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:04:30,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:04:30,777 INFO L87 Difference]: Start difference. First operand 25 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:30,840 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2021-05-03 14:04:30,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:04:30,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-03 14:04:30,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:30,842 INFO L225 Difference]: With dead ends: 43 [2021-05-03 14:04:30,842 INFO L226 Difference]: Without dead ends: 38 [2021-05-03 14:04:30,843 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-03 14:04:30,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-05-03 14:04:30,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-05-03 14:04:30,853 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-05-03 14:04:30,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:30,854 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-05-03 14:04:30,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,855 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-05-03 14:04:30,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 14:04:30,856 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:30,856 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:31,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:31,073 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:31,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:31,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2049322798, now seen corresponding path program 1 times [2021-05-03 14:04:31,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:31,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401260024] [2021-05-03 14:04:31,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:31,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401260024] [2021-05-03 14:04:31,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:04:31,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 14:04:31,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964479951] [2021-05-03 14:04:31,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:04:31,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:31,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:04:31,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:04:31,116 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:31,131 INFO L93 Difference]: Finished difference Result 30 states and 55 transitions. [2021-05-03 14:04:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:04:31,132 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 [2021-05-03 14:04:31,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:31,132 INFO L225 Difference]: With dead ends: 30 [2021-05-03 14:04:31,132 INFO L226 Difference]: Without dead ends: 30 [2021-05-03 14:04:31,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:04:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-03 14:04:31,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-05-03 14:04:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-05-03 14:04:31,136 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2021-05-03 14:04:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:31,136 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-05-03 14:04:31,136 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) [2021-05-03 14:04:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-05-03 14:04:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:04:31,137 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:31,137 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:31,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-03 14:04:31,137 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:31,137 INFO L82 PathProgramCache]: Analyzing trace with hash 268202073, now seen corresponding path program 3 times [2021-05-03 14:04:31,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:31,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737261492] [2021-05-03 14:04:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:31,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737261492] [2021-05-03 14:04:31,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212994119] [2021-05-03 14:04:31,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:31,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:04:31,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:31,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 14:04:31,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:31,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:31,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-03 14:04:31,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524500581] [2021-05-03 14:04:31,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 14:04:31,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:31,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 14:04:31,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:04:31,244 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:31,290 INFO L93 Difference]: Finished difference Result 51 states and 85 transitions. [2021-05-03 14:04:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:04:31,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-03 14:04:31,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:31,301 INFO L225 Difference]: With dead ends: 51 [2021-05-03 14:04:31,301 INFO L226 Difference]: Without dead ends: 51 [2021-05-03 14:04:31,302 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:04:31,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-03 14:04:31,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2021-05-03 14:04:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 54 transitions. [2021-05-03 14:04:31,310 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 54 transitions. Word has length 12 [2021-05-03 14:04:31,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:31,311 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 54 transitions. [2021-05-03 14:04:31,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,311 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 54 transitions. [2021-05-03 14:04:31,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:04:31,312 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:31,312 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:31,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:31,536 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:31,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:31,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1927934254, now seen corresponding path program 1 times [2021-05-03 14:04:31,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:31,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492955876] [2021-05-03 14:04:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:31,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492955876] [2021-05-03 14:04:31,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902454290] [2021-05-03 14:04:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:31,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 14:04:31,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:31,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:31,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-03 14:04:31,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158077455] [2021-05-03 14:04:31,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 14:04:31,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:31,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 14:04:31,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:04:31,630 INFO L87 Difference]: Start difference. First operand 28 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:31,673 INFO L93 Difference]: Finished difference Result 57 states and 97 transitions. [2021-05-03 14:04:31,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:04:31,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-03 14:04:31,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:31,674 INFO L225 Difference]: With dead ends: 57 [2021-05-03 14:04:31,674 INFO L226 Difference]: Without dead ends: 54 [2021-05-03 14:04:31,674 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:31,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-03 14:04:31,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 32. [2021-05-03 14:04:31,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 63 transitions. [2021-05-03 14:04:31,678 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 63 transitions. Word has length 12 [2021-05-03 14:04:31,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:31,678 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 63 transitions. [2021-05-03 14:04:31,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,678 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 63 transitions. [2021-05-03 14:04:31,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:04:31,679 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:31,679 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:31,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:31,897 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:31,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:31,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1897554585, now seen corresponding path program 4 times [2021-05-03 14:04:31,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:31,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459563986] [2021-05-03 14:04:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:31,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459563986] [2021-05-03 14:04:31,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180882800] [2021-05-03 14:04:31,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:31,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:31,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:31,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 14:04:31,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:31,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:31,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-03 14:04:31,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727717792] [2021-05-03 14:04:31,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 14:04:31,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:31,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 14:04:31,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:04:31,995 INFO L87 Difference]: Start difference. First operand 32 states and 63 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:32,047 INFO L93 Difference]: Finished difference Result 43 states and 76 transitions. [2021-05-03 14:04:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:04:32,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-03 14:04:32,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:32,049 INFO L225 Difference]: With dead ends: 43 [2021-05-03 14:04:32,049 INFO L226 Difference]: Without dead ends: 41 [2021-05-03 14:04:32,049 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-03 14:04:32,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-05-03 14:04:32,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 62 transitions. [2021-05-03 14:04:32,057 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 62 transitions. Word has length 12 [2021-05-03 14:04:32,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:32,057 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 62 transitions. [2021-05-03 14:04:32,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,057 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 62 transitions. [2021-05-03 14:04:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:04:32,058 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:32,058 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:32,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-03 14:04:32,273 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:32,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:32,273 INFO L82 PathProgramCache]: Analyzing trace with hash 261530456, now seen corresponding path program 2 times [2021-05-03 14:04:32,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:32,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399072537] [2021-05-03 14:04:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:32,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399072537] [2021-05-03 14:04:32,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416956210] [2021-05-03 14:04:32,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:32,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:32,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:32,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 14:04:32,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:32,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:32,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-03 14:04:32,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914893112] [2021-05-03 14:04:32,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 14:04:32,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:32,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 14:04:32,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:04:32,367 INFO L87 Difference]: Start difference. First operand 32 states and 62 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:32,404 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2021-05-03 14:04:32,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:04:32,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-03 14:04:32,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:32,406 INFO L225 Difference]: With dead ends: 45 [2021-05-03 14:04:32,406 INFO L226 Difference]: Without dead ends: 45 [2021-05-03 14:04:32,406 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:04:32,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-03 14:04:32,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2021-05-03 14:04:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 58 transitions. [2021-05-03 14:04:32,411 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 58 transitions. Word has length 12 [2021-05-03 14:04:32,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:32,411 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 58 transitions. [2021-05-03 14:04:32,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,412 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 58 transitions. [2021-05-03 14:04:32,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:04:32,413 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:32,413 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:32,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:32,635 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:32,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:32,636 INFO L82 PathProgramCache]: Analyzing trace with hash -905381939, now seen corresponding path program 5 times [2021-05-03 14:04:32,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:32,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129654169] [2021-05-03 14:04:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:32,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129654169] [2021-05-03 14:04:32,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:04:32,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:04:32,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678999055] [2021-05-03 14:04:32,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:04:32,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:32,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:04:32,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:04:32,665 INFO L87 Difference]: Start difference. First operand 31 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:32,681 INFO L93 Difference]: Finished difference Result 33 states and 59 transitions. [2021-05-03 14:04:32,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:04:32,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-03 14:04:32,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:32,682 INFO L225 Difference]: With dead ends: 33 [2021-05-03 14:04:32,682 INFO L226 Difference]: Without dead ends: 29 [2021-05-03 14:04:32,682 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:04:32,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-03 14:04:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-03 14:04:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-05-03 14:04:32,684 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-05-03 14:04:32,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:32,685 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-05-03 14:04:32,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,685 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-05-03 14:04:32,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:04:32,685 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:32,685 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:32,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-03 14:04:32,685 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:32,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:32,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1796703570, now seen corresponding path program 3 times [2021-05-03 14:04:32,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:32,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695036182] [2021-05-03 14:04:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:32,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695036182] [2021-05-03 14:04:32,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266457552] [2021-05-03 14:04:32,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:32,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:04:32,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:32,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 14:04:32,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:32,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:32,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-03 14:04:32,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408071330] [2021-05-03 14:04:32,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 14:04:32,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:32,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 14:04:32,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:04:32,771 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:32,826 INFO L93 Difference]: Finished difference Result 40 states and 75 transitions. [2021-05-03 14:04:32,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:04:32,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-03 14:04:32,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:32,827 INFO L225 Difference]: With dead ends: 40 [2021-05-03 14:04:32,827 INFO L226 Difference]: Without dead ends: 40 [2021-05-03 14:04:32,827 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-03 14:04:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-05-03 14:04:32,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 63 transitions. [2021-05-03 14:04:32,829 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 63 transitions. Word has length 12 [2021-05-03 14:04:32,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:32,829 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 63 transitions. [2021-05-03 14:04:32,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,829 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 63 transitions. [2021-05-03 14:04:32,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:04:32,830 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:32,830 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:33,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-03 14:04:33,054 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:33,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:33,054 INFO L82 PathProgramCache]: Analyzing trace with hash 549941096, now seen corresponding path program 4 times [2021-05-03 14:04:33,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:33,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982355107] [2021-05-03 14:04:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:33,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982355107] [2021-05-03 14:04:33,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330696313] [2021-05-03 14:04:33,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:33,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:33,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:33,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 14:04:33,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:33,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:33,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-05-03 14:04:33,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:33,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:33,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:33,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-05-03 14:04:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:33,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:33,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:33,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307838448] [2021-05-03 14:04:33,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:33,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:33,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:33,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:33,304 INFO L87 Difference]: Start difference. First operand 33 states and 63 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:33,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:33,393 INFO L93 Difference]: Finished difference Result 48 states and 90 transitions. [2021-05-03 14:04:33,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:04:33,394 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:04:33,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:33,395 INFO L225 Difference]: With dead ends: 48 [2021-05-03 14:04:33,395 INFO L226 Difference]: Without dead ends: 38 [2021-05-03 14:04:33,395 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:33,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-03 14:04:33,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-05-03 14:04:33,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:33,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 67 transitions. [2021-05-03 14:04:33,399 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 67 transitions. Word has length 13 [2021-05-03 14:04:33,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:33,399 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 67 transitions. [2021-05-03 14:04:33,400 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) [2021-05-03 14:04:33,400 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 67 transitions. [2021-05-03 14:04:33,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:04:33,400 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:33,400 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:33,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 14:04:33,601 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:33,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:33,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1116462702, now seen corresponding path program 5 times [2021-05-03 14:04:33,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:33,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594215567] [2021-05-03 14:04:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:33,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594215567] [2021-05-03 14:04:33,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542071023] [2021-05-03 14:04:33,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:33,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:33,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:33,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 14:04:33,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:33,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:33,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-05-03 14:04:33,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:33,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:33,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:33,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-05-03 14:04:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:33,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:33,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:33,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485625620] [2021-05-03 14:04:33,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:33,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:33,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:33,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:33,877 INFO L87 Difference]: Start difference. First operand 35 states and 67 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:33,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:33,991 INFO L93 Difference]: Finished difference Result 59 states and 114 transitions. [2021-05-03 14:04:33,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:33,992 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 13 [2021-05-03 14:04:33,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:33,993 INFO L225 Difference]: With dead ends: 59 [2021-05-03 14:04:33,993 INFO L226 Difference]: Without dead ends: 45 [2021-05-03 14:04:33,993 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:33,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-03 14:04:33,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-03 14:04:33,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:33,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2021-05-03 14:04:33,995 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 13 [2021-05-03 14:04:33,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:33,996 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2021-05-03 14:04:33,996 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) [2021-05-03 14:04:33,996 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2021-05-03 14:04:33,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:04:33,996 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:33,996 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:34,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 14:04:34,218 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:34,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:34,219 INFO L82 PathProgramCache]: Analyzing trace with hash -257588172, now seen corresponding path program 6 times [2021-05-03 14:04:34,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:34,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806897958] [2021-05-03 14:04:34,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:34,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806897958] [2021-05-03 14:04:34,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074992143] [2021-05-03 14:04:34,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:34,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:04:34,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:34,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 14:04:34,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:34,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:34,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-05-03 14:04:34,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:04:34,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:34,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-05-03 14:04:34,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:34,526 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:04:34,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:04:34,531 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-05-03 14:04:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:34,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:34,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:34,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952869768] [2021-05-03 14:04:34,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:34,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:34,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:34,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:34,569 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:34,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:34,734 INFO L93 Difference]: Finished difference Result 76 states and 152 transitions. [2021-05-03 14:04:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:04:34,735 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:04:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:34,735 INFO L225 Difference]: With dead ends: 76 [2021-05-03 14:04:34,735 INFO L226 Difference]: Without dead ends: 66 [2021-05-03 14:04:34,736 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-03 14:04:34,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 38. [2021-05-03 14:04:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2021-05-03 14:04:34,739 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 13 [2021-05-03 14:04:34,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:34,739 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2021-05-03 14:04:34,739 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) [2021-05-03 14:04:34,739 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2021-05-03 14:04:34,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:04:34,739 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:34,739 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:34,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:34,953 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:34,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1120270568, now seen corresponding path program 7 times [2021-05-03 14:04:34,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:34,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306713450] [2021-05-03 14:04:34,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:35,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306713450] [2021-05-03 14:04:35,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918322224] [2021-05-03 14:04:35,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:35,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 14:04:35,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:35,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:35,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-05-03 14:04:35,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:35,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:35,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:35,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-05-03 14:04:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:35,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:35,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:35,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753508067] [2021-05-03 14:04:35,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:35,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:35,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:35,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:35,165 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:35,338 INFO L93 Difference]: Finished difference Result 61 states and 123 transitions. [2021-05-03 14:04:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:35,339 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:04:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:35,339 INFO L225 Difference]: With dead ends: 61 [2021-05-03 14:04:35,339 INFO L226 Difference]: Without dead ends: 47 [2021-05-03 14:04:35,340 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:35,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-03 14:04:35,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-05-03 14:04:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.261904761904762) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 95 transitions. [2021-05-03 14:04:35,342 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 95 transitions. Word has length 13 [2021-05-03 14:04:35,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:35,343 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 95 transitions. [2021-05-03 14:04:35,343 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) [2021-05-03 14:04:35,343 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 95 transitions. [2021-05-03 14:04:35,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:04:35,343 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:35,343 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:35,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 14:04:35,557 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:35,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:35,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1979145098, now seen corresponding path program 8 times [2021-05-03 14:04:35,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:35,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564599065] [2021-05-03 14:04:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:35,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564599065] [2021-05-03 14:04:35,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832312006] [2021-05-03 14:04:35,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:35,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:35,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:35,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 14:04:35,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:35,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:35,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-05-03 14:04:35,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:04:35,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:35,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-05-03 14:04:35,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:35,819 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:04:35,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:04:35,820 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-05-03 14:04:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:35,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:35,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:35,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979879710] [2021-05-03 14:04:35,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:35,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:35,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:35,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:35,856 INFO L87 Difference]: Start difference. First operand 43 states and 95 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:36,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:36,053 INFO L93 Difference]: Finished difference Result 84 states and 165 transitions. [2021-05-03 14:04:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:36,054 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:04:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:36,054 INFO L225 Difference]: With dead ends: 84 [2021-05-03 14:04:36,054 INFO L226 Difference]: Without dead ends: 67 [2021-05-03 14:04:36,055 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:36,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-03 14:04:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-05-03 14:04:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 94 transitions. [2021-05-03 14:04:36,057 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 94 transitions. Word has length 13 [2021-05-03 14:04:36,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:36,057 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 94 transitions. [2021-05-03 14:04:36,058 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) [2021-05-03 14:04:36,058 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 94 transitions. [2021-05-03 14:04:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:04:36,058 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:36,058 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:36,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 14:04:36,280 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:36,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:36,280 INFO L82 PathProgramCache]: Analyzing trace with hash -605208890, now seen corresponding path program 9 times [2021-05-03 14:04:36,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:36,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828758266] [2021-05-03 14:04:36,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:36,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828758266] [2021-05-03 14:04:36,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978142011] [2021-05-03 14:04:36,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:36,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:04:36,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:36,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 14:04:36,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:36,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:36,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-05-03 14:04:36,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:04:36,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:36,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-05-03 14:04:36,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:36,523 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:04:36,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:04:36,524 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-05-03 14:04:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:36,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:36,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:36,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711049608] [2021-05-03 14:04:36,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:36,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:36,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:36,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:36,558 INFO L87 Difference]: Start difference. First operand 43 states and 94 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:36,732 INFO L93 Difference]: Finished difference Result 64 states and 135 transitions. [2021-05-03 14:04:36,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:36,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:04:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:36,733 INFO L225 Difference]: With dead ends: 64 [2021-05-03 14:04:36,733 INFO L226 Difference]: Without dead ends: 59 [2021-05-03 14:04:36,733 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:04:36,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-03 14:04:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2021-05-03 14:04:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 94 transitions. [2021-05-03 14:04:36,738 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 94 transitions. Word has length 13 [2021-05-03 14:04:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:36,738 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 94 transitions. [2021-05-03 14:04:36,738 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) [2021-05-03 14:04:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 94 transitions. [2021-05-03 14:04:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:04:36,738 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:36,738 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:36,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-03 14:04:36,945 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:36,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:36,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1739525202, now seen corresponding path program 10 times [2021-05-03 14:04:36,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:36,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147773422] [2021-05-03 14:04:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:37,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147773422] [2021-05-03 14:04:37,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796682482] [2021-05-03 14:04:37,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:37,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:37,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:37,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 14:04:37,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:37,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:37,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-05-03 14:04:37,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:37,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:37,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:37,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-05-03 14:04:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:37,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:37,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:37,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907972742] [2021-05-03 14:04:37,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:37,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:37,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:37,188 INFO L87 Difference]: Start difference. First operand 43 states and 94 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:37,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:37,325 INFO L93 Difference]: Finished difference Result 67 states and 142 transitions. [2021-05-03 14:04:37,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:37,325 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:04:37,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:37,326 INFO L225 Difference]: With dead ends: 67 [2021-05-03 14:04:37,326 INFO L226 Difference]: Without dead ends: 53 [2021-05-03 14:04:37,326 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:37,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-03 14:04:37,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-05-03 14:04:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 47 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2021-05-03 14:04:37,329 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2021-05-03 14:04:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:37,329 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2021-05-03 14:04:37,329 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) [2021-05-03 14:04:37,329 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2021-05-03 14:04:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:04:37,329 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:37,330 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:37,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:37,537 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:37,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:37,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1696567564, now seen corresponding path program 11 times [2021-05-03 14:04:37,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:37,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429854781] [2021-05-03 14:04:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:37,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429854781] [2021-05-03 14:04:37,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716811397] [2021-05-03 14:04:37,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:37,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:04:37,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:37,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 14:04:37,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:37,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:37,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-05-03 14:04:37,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:04:37,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:37,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-05-03 14:04:37,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:37,759 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:04:37,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:04:37,760 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-05-03 14:04:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:37,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:37,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:37,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529061337] [2021-05-03 14:04:37,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:37,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:37,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:37,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:37,790 INFO L87 Difference]: Start difference. First operand 48 states and 111 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:38,009 INFO L93 Difference]: Finished difference Result 89 states and 192 transitions. [2021-05-03 14:04:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:38,010 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:04:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:38,010 INFO L225 Difference]: With dead ends: 89 [2021-05-03 14:04:38,010 INFO L226 Difference]: Without dead ends: 79 [2021-05-03 14:04:38,011 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-03 14:04:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 48. [2021-05-03 14:04:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 47 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2021-05-03 14:04:38,016 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2021-05-03 14:04:38,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:38,016 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2021-05-03 14:04:38,017 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) [2021-05-03 14:04:38,017 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2021-05-03 14:04:38,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:04:38,017 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:38,017 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:38,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-03 14:04:38,229 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:38,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:38,229 INFO L82 PathProgramCache]: Analyzing trace with hash 14045744, now seen corresponding path program 12 times [2021-05-03 14:04:38,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:38,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711955079] [2021-05-03 14:04:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:38,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711955079] [2021-05-03 14:04:38,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125836637] [2021-05-03 14:04:38,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:38,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:04:38,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:38,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 14:04:38,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:38,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:38,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-05-03 14:04:38,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:04:38,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:38,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-05-03 14:04:38,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:38,463 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-05-03 14:04:38,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:04:38,464 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-05-03 14:04:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:38,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:38,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:38,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100473966] [2021-05-03 14:04:38,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:38,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:38,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:38,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:38,495 INFO L87 Difference]: Start difference. First operand 48 states and 111 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:38,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:38,714 INFO L93 Difference]: Finished difference Result 72 states and 158 transitions. [2021-05-03 14:04:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:38,714 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:04:38,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:38,715 INFO L225 Difference]: With dead ends: 72 [2021-05-03 14:04:38,715 INFO L226 Difference]: Without dead ends: 67 [2021-05-03 14:04:38,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:38,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-03 14:04:38,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2021-05-03 14:04:38,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 47 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2021-05-03 14:04:38,721 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2021-05-03 14:04:38,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:38,721 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2021-05-03 14:04:38,721 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) [2021-05-03 14:04:38,721 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2021-05-03 14:04:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:04:38,724 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:38,724 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:38,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:38,945 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:38,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:38,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1503450740, now seen corresponding path program 13 times [2021-05-03 14:04:38,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:38,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939524266] [2021-05-03 14:04:38,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:39,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939524266] [2021-05-03 14:04:39,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078058851] [2021-05-03 14:04:39,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:39,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 14:04:39,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:39,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:39,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-05-03 14:04:39,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:04:39,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:39,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-05-03 14:04:39,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:39,189 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:04:39,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:04:39,190 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-05-03 14:04:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:39,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:39,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:39,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717942510] [2021-05-03 14:04:39,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:39,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:39,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:39,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:39,219 INFO L87 Difference]: Start difference. First operand 48 states and 111 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:39,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:39,440 INFO L93 Difference]: Finished difference Result 77 states and 171 transitions. [2021-05-03 14:04:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:04:39,440 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:04:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:39,441 INFO L225 Difference]: With dead ends: 77 [2021-05-03 14:04:39,441 INFO L226 Difference]: Without dead ends: 72 [2021-05-03 14:04:39,441 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 248.5ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:39,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-03 14:04:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2021-05-03 14:04:39,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.326530612244898) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 114 transitions. [2021-05-03 14:04:39,444 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 114 transitions. Word has length 13 [2021-05-03 14:04:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:39,444 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 114 transitions. [2021-05-03 14:04:39,444 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) [2021-05-03 14:04:39,444 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 114 transitions. [2021-05-03 14:04:39,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:39,444 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:39,444 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:39,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:39,661 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:39,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:39,661 INFO L82 PathProgramCache]: Analyzing trace with hash 781826158, now seen corresponding path program 14 times [2021-05-03 14:04:39,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:39,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901360114] [2021-05-03 14:04:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:39,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901360114] [2021-05-03 14:04:39,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329259732] [2021-05-03 14:04:39,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:39,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:39,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:39,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:04:39,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:39,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:39,885 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 [2021-05-03 14:04:39,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:39,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:39,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:39,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:04:39,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:39,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:39,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:39,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941736603] [2021-05-03 14:04:39,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:39,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:39,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:39,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:39,905 INFO L87 Difference]: Start difference. First operand 50 states and 114 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:40,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:40,057 INFO L93 Difference]: Finished difference Result 68 states and 151 transitions. [2021-05-03 14:04:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:04:40,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:04:40,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:40,062 INFO L225 Difference]: With dead ends: 68 [2021-05-03 14:04:40,062 INFO L226 Difference]: Without dead ends: 63 [2021-05-03 14:04:40,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:40,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-03 14:04:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-05-03 14:04:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 128 transitions. [2021-05-03 14:04:40,066 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 128 transitions. Word has length 14 [2021-05-03 14:04:40,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:40,067 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 128 transitions. [2021-05-03 14:04:40,067 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) [2021-05-03 14:04:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 128 transitions. [2021-05-03 14:04:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:40,068 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:40,068 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:40,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-03 14:04:40,281 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:40,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:40,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1352155630, now seen corresponding path program 15 times [2021-05-03 14:04:40,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:40,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892260840] [2021-05-03 14:04:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:40,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892260840] [2021-05-03 14:04:40,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853503160] [2021-05-03 14:04:40,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:40,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:04:40,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:40,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:04:40,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:40,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:40,473 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 [2021-05-03 14:04:40,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:40,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:40,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:40,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:04:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:40,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:40,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:40,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037670730] [2021-05-03 14:04:40,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:40,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:40,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:40,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:40,491 INFO L87 Difference]: Start difference. First operand 56 states and 128 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:40,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:40,633 INFO L93 Difference]: Finished difference Result 91 states and 189 transitions. [2021-05-03 14:04:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:40,633 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:04:40,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:40,634 INFO L225 Difference]: With dead ends: 91 [2021-05-03 14:04:40,634 INFO L226 Difference]: Without dead ends: 86 [2021-05-03 14:04:40,634 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:04:40,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-03 14:04:40,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2021-05-03 14:04:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:40,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 128 transitions. [2021-05-03 14:04:40,636 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 128 transitions. Word has length 14 [2021-05-03 14:04:40,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:40,637 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 128 transitions. [2021-05-03 14:04:40,637 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) [2021-05-03 14:04:40,637 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 128 transitions. [2021-05-03 14:04:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:40,637 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:40,637 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:40,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:40,845 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:40,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:40,845 INFO L82 PathProgramCache]: Analyzing trace with hash -373323828, now seen corresponding path program 16 times [2021-05-03 14:04:40,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:40,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832044292] [2021-05-03 14:04:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:40,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832044292] [2021-05-03 14:04:40,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688071390] [2021-05-03 14:04:40,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:40,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:40,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:40,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:04:40,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:41,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:41,054 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 [2021-05-03 14:04:41,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:41,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:41,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:41,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:04:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:41,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:41,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:41,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989260441] [2021-05-03 14:04:41,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:41,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:41,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:41,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:41,074 INFO L87 Difference]: Start difference. First operand 56 states and 128 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:41,285 INFO L93 Difference]: Finished difference Result 91 states and 193 transitions. [2021-05-03 14:04:41,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:04:41,285 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:04:41,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:41,287 INFO L225 Difference]: With dead ends: 91 [2021-05-03 14:04:41,287 INFO L226 Difference]: Without dead ends: 86 [2021-05-03 14:04:41,287 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:04:41,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-03 14:04:41,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2021-05-03 14:04:41,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-05-03 14:04:41,289 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 14 [2021-05-03 14:04:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:41,290 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-05-03 14:04:41,290 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) [2021-05-03 14:04:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-05-03 14:04:41,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:41,290 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:41,290 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:41,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-03 14:04:41,501 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:41,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:41,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2009347957, now seen corresponding path program 17 times [2021-05-03 14:04:41,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:41,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166406015] [2021-05-03 14:04:41,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:41,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166406015] [2021-05-03 14:04:41,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659385730] [2021-05-03 14:04:41,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:41,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:04:41,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:41,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:04:41,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:41,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:41,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 14:04:41,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734040053] [2021-05-03 14:04:41,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:04:41,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:41,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:04:41,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:04:41,623 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:41,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:41,658 INFO L93 Difference]: Finished difference Result 121 states and 238 transitions. [2021-05-03 14:04:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:04:41,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:04:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:41,659 INFO L225 Difference]: With dead ends: 121 [2021-05-03 14:04:41,659 INFO L226 Difference]: Without dead ends: 121 [2021-05-03 14:04:41,659 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-03 14:04:41,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 62. [2021-05-03 14:04:41,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-05-03 14:04:41,665 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-05-03 14:04:41,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:41,665 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-05-03 14:04:41,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:41,665 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-05-03 14:04:41,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:41,666 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:41,666 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:41,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:41,888 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:41,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:41,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1971410264, now seen corresponding path program 18 times [2021-05-03 14:04:41,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:41,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742518525] [2021-05-03 14:04:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:41,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742518525] [2021-05-03 14:04:41,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320673124] [2021-05-03 14:04:41,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:41,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:04:41,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:41,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:04:41,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:42,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:42,081 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 [2021-05-03 14:04:42,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:42,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:42,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:42,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:04:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:42,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:42,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:42,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159127210] [2021-05-03 14:04:42,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:42,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:42,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:42,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:42,102 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:42,263 INFO L93 Difference]: Finished difference Result 85 states and 189 transitions. [2021-05-03 14:04:42,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:42,263 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:04:42,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:42,264 INFO L225 Difference]: With dead ends: 85 [2021-05-03 14:04:42,264 INFO L226 Difference]: Without dead ends: 80 [2021-05-03 14:04:42,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:04:42,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-03 14:04:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2021-05-03 14:04:42,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:42,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-05-03 14:04:42,267 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-05-03 14:04:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:42,267 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-05-03 14:04:42,267 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) [2021-05-03 14:04:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-05-03 14:04:42,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:42,268 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:42,268 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:42,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:42,481 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:42,481 INFO L82 PathProgramCache]: Analyzing trace with hash 245930806, now seen corresponding path program 19 times [2021-05-03 14:04:42,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:42,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117489602] [2021-05-03 14:04:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:42,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117489602] [2021-05-03 14:04:42,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796074702] [2021-05-03 14:04:42,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:42,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:04:42,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:42,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:42,692 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 [2021-05-03 14:04:42,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:42,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:42,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:42,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:04:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:42,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:42,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:42,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330958180] [2021-05-03 14:04:42,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:42,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:42,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:42,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:42,714 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:42,840 INFO L93 Difference]: Finished difference Result 88 states and 187 transitions. [2021-05-03 14:04:42,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:42,841 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:04:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:42,841 INFO L225 Difference]: With dead ends: 88 [2021-05-03 14:04:42,841 INFO L226 Difference]: Without dead ends: 83 [2021-05-03 14:04:42,841 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:42,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-03 14:04:42,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 62. [2021-05-03 14:04:42,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:42,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-05-03 14:04:42,844 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-05-03 14:04:42,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:42,844 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-05-03 14:04:42,844 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) [2021-05-03 14:04:42,844 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-05-03 14:04:42,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:42,844 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:42,844 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:43,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-03 14:04:43,065 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:43,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1735335802, now seen corresponding path program 20 times [2021-05-03 14:04:43,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:43,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112658884] [2021-05-03 14:04:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:43,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112658884] [2021-05-03 14:04:43,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028761043] [2021-05-03 14:04:43,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:43,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:43,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:43,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:04:43,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:43,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:43,235 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 [2021-05-03 14:04:43,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:43,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:43,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:43,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:04:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:43,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:43,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:43,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924542520] [2021-05-03 14:04:43,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:43,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:43,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:43,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:43,250 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:43,406 INFO L93 Difference]: Finished difference Result 100 states and 215 transitions. [2021-05-03 14:04:43,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:43,407 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:04:43,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:43,408 INFO L225 Difference]: With dead ends: 100 [2021-05-03 14:04:43,409 INFO L226 Difference]: Without dead ends: 95 [2021-05-03 14:04:43,409 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:43,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-03 14:04:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2021-05-03 14:04:43,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-05-03 14:04:43,411 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-05-03 14:04:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:43,411 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-05-03 14:04:43,411 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) [2021-05-03 14:04:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-05-03 14:04:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:43,412 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:43,412 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:43,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:43,628 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:43,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:43,628 INFO L82 PathProgramCache]: Analyzing trace with hash 844014171, now seen corresponding path program 21 times [2021-05-03 14:04:43,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:43,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308343025] [2021-05-03 14:04:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:43,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308343025] [2021-05-03 14:04:43,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672936806] [2021-05-03 14:04:43,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:43,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:04:43,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:43,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:04:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:43,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:43,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 14:04:43,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83705255] [2021-05-03 14:04:43,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:04:43,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:43,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:04:43,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:43,721 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:43,780 INFO L93 Difference]: Finished difference Result 145 states and 286 transitions. [2021-05-03 14:04:43,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:04:43,780 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 [2021-05-03 14:04:43,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:43,781 INFO L225 Difference]: With dead ends: 145 [2021-05-03 14:04:43,781 INFO L226 Difference]: Without dead ends: 145 [2021-05-03 14:04:43,781 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:43,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-03 14:04:43,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 68. [2021-05-03 14:04:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:43,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2021-05-03 14:04:43,784 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 14 [2021-05-03 14:04:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:43,784 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2021-05-03 14:04:43,784 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) [2021-05-03 14:04:43,784 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2021-05-03 14:04:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:43,784 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:43,784 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:43,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-03 14:04:43,993 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:43,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:43,993 INFO L82 PathProgramCache]: Analyzing trace with hash -306532562, now seen corresponding path program 22 times [2021-05-03 14:04:43,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:43,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320913319] [2021-05-03 14:04:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:44,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320913319] [2021-05-03 14:04:44,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815620754] [2021-05-03 14:04:44,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:44,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:44,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:44,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:04:44,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:44,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:44,176 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 [2021-05-03 14:04:44,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:44,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:44,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:44,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:04:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:44,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:44,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:44,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183110368] [2021-05-03 14:04:44,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:44,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:44,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:44,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:44,192 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:44,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:44,333 INFO L93 Difference]: Finished difference Result 86 states and 210 transitions. [2021-05-03 14:04:44,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:44,333 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:04:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:44,334 INFO L225 Difference]: With dead ends: 86 [2021-05-03 14:04:44,334 INFO L226 Difference]: Without dead ends: 81 [2021-05-03 14:04:44,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:44,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-03 14:04:44,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2021-05-03 14:04:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2021-05-03 14:04:44,337 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 14 [2021-05-03 14:04:44,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:44,337 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2021-05-03 14:04:44,337 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) [2021-05-03 14:04:44,337 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2021-05-03 14:04:44,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:44,337 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:44,337 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:44,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-03 14:04:44,549 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:44,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2032012020, now seen corresponding path program 23 times [2021-05-03 14:04:44,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:44,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530033964] [2021-05-03 14:04:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:44,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530033964] [2021-05-03 14:04:44,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016128863] [2021-05-03 14:04:44,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:44,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:04:44,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:44,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:04:44,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:44,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:44,722 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 [2021-05-03 14:04:44,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:44,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:44,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:44,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:04:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:44,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:44,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:44,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281407722] [2021-05-03 14:04:44,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:44,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:44,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:44,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:44,740 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:44,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:44,868 INFO L93 Difference]: Finished difference Result 95 states and 213 transitions. [2021-05-03 14:04:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:44,869 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:04:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:44,870 INFO L225 Difference]: With dead ends: 95 [2021-05-03 14:04:44,870 INFO L226 Difference]: Without dead ends: 90 [2021-05-03 14:04:44,870 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-03 14:04:44,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2021-05-03 14:04:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2021-05-03 14:04:44,872 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 14 [2021-05-03 14:04:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:44,872 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2021-05-03 14:04:44,872 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) [2021-05-03 14:04:44,872 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2021-05-03 14:04:44,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:44,873 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:44,873 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:45,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-03 14:04:45,081 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:45,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:45,081 INFO L82 PathProgramCache]: Analyzing trace with hash 626931147, now seen corresponding path program 24 times [2021-05-03 14:04:45,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:45,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046760380] [2021-05-03 14:04:45,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:45,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046760380] [2021-05-03 14:04:45,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15814381] [2021-05-03 14:04:45,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:45,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:04:45,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:45,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:04:45,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:45,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:45,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 14:04:45,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602404250] [2021-05-03 14:04:45,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:04:45,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:45,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:04:45,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:04:45,176 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:45,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:45,205 INFO L93 Difference]: Finished difference Result 127 states and 274 transitions. [2021-05-03 14:04:45,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:04:45,206 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:04:45,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:45,206 INFO L225 Difference]: With dead ends: 127 [2021-05-03 14:04:45,206 INFO L226 Difference]: Without dead ends: 127 [2021-05-03 14:04:45,207 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:45,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-03 14:04:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 77. [2021-05-03 14:04:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.6052631578947367) internal successors, (198), 76 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 198 transitions. [2021-05-03 14:04:45,209 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 198 transitions. Word has length 14 [2021-05-03 14:04:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:45,210 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 198 transitions. [2021-05-03 14:04:45,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 198 transitions. [2021-05-03 14:04:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:45,210 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:45,210 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:45,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:45,425 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:45,425 INFO L82 PathProgramCache]: Analyzing trace with hash -542607024, now seen corresponding path program 25 times [2021-05-03 14:04:45,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:45,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398040779] [2021-05-03 14:04:45,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:45,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398040779] [2021-05-03 14:04:45,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277838931] [2021-05-03 14:04:45,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:45,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:04:45,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:45,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:45,614 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 [2021-05-03 14:04:45,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:45,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:45,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:45,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:04:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:45,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:45,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:45,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204995981] [2021-05-03 14:04:45,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:45,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:45,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:45,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:45,634 INFO L87 Difference]: Start difference. First operand 77 states and 198 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:45,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:45,761 INFO L93 Difference]: Finished difference Result 108 states and 241 transitions. [2021-05-03 14:04:45,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:45,761 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:04:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:45,762 INFO L225 Difference]: With dead ends: 108 [2021-05-03 14:04:45,762 INFO L226 Difference]: Without dead ends: 103 [2021-05-03 14:04:45,762 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:45,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-03 14:04:45,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 77. [2021-05-03 14:04:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.6052631578947367) internal successors, (198), 76 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 198 transitions. [2021-05-03 14:04:45,765 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 198 transitions. Word has length 14 [2021-05-03 14:04:45,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:45,765 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 198 transitions. [2021-05-03 14:04:45,765 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) [2021-05-03 14:04:45,765 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 198 transitions. [2021-05-03 14:04:45,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:45,765 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:45,765 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:45,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-03 14:04:45,977 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:45,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:45,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1433928655, now seen corresponding path program 26 times [2021-05-03 14:04:45,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:45,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073364736] [2021-05-03 14:04:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:46,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073364736] [2021-05-03 14:04:46,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562440326] [2021-05-03 14:04:46,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:46,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:46,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:46,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:04:46,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:46,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:46,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 14:04:46,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130979391] [2021-05-03 14:04:46,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:04:46,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:46,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:04:46,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:46,071 INFO L87 Difference]: Start difference. First operand 77 states and 198 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:46,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:46,144 INFO L93 Difference]: Finished difference Result 141 states and 294 transitions. [2021-05-03 14:04:46,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:04:46,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:04:46,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:46,146 INFO L225 Difference]: With dead ends: 141 [2021-05-03 14:04:46,146 INFO L226 Difference]: Without dead ends: 141 [2021-05-03 14:04:46,146 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-03 14:04:46,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 73. [2021-05-03 14:04:46,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5694444444444446) internal successors, (185), 72 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2021-05-03 14:04:46,149 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 14 [2021-05-03 14:04:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:46,149 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2021-05-03 14:04:46,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2021-05-03 14:04:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:46,149 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:46,149 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:46,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:46,350 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:46,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1615692404, now seen corresponding path program 27 times [2021-05-03 14:04:46,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:46,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757784316] [2021-05-03 14:04:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:46,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757784316] [2021-05-03 14:04:46,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229941998] [2021-05-03 14:04:46,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:46,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:04:46,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:46,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:04:46,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:46,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:46,552 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 [2021-05-03 14:04:46,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:46,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:46,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:46,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-05-03 14:04:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:46,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:46,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 14:04:46,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548304926] [2021-05-03 14:04:46,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:46,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:46,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:46,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:46,571 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:46,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:46,775 INFO L93 Difference]: Finished difference Result 126 states and 281 transitions. [2021-05-03 14:04:46,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:46,776 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:04:46,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:46,776 INFO L225 Difference]: With dead ends: 126 [2021-05-03 14:04:46,776 INFO L226 Difference]: Without dead ends: 121 [2021-05-03 14:04:46,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:04:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-03 14:04:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2021-05-03 14:04:46,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5405405405405403) internal successors, (188), 74 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 188 transitions. [2021-05-03 14:04:46,780 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 188 transitions. Word has length 14 [2021-05-03 14:04:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:46,780 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 188 transitions. [2021-05-03 14:04:46,780 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) [2021-05-03 14:04:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 188 transitions. [2021-05-03 14:04:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:46,781 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:46,781 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:47,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-03 14:04:47,003 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:47,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:47,003 INFO L82 PathProgramCache]: Analyzing trace with hash -896073077, now seen corresponding path program 28 times [2021-05-03 14:04:47,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:47,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561189885] [2021-05-03 14:04:47,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:47,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561189885] [2021-05-03 14:04:47,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720997424] [2021-05-03 14:04:47,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:47,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:47,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:47,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:04:47,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:47,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:47,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 14:04:47,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157287620] [2021-05-03 14:04:47,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:04:47,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:47,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:04:47,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:47,091 INFO L87 Difference]: Start difference. First operand 75 states and 188 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:47,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:47,169 INFO L93 Difference]: Finished difference Result 117 states and 263 transitions. [2021-05-03 14:04:47,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:47,169 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:04:47,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:47,170 INFO L225 Difference]: With dead ends: 117 [2021-05-03 14:04:47,170 INFO L226 Difference]: Without dead ends: 117 [2021-05-03 14:04:47,170 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:47,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-03 14:04:47,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2021-05-03 14:04:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.569620253164557) internal successors, (203), 79 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:47,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2021-05-03 14:04:47,172 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 14 [2021-05-03 14:04:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:47,173 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2021-05-03 14:04:47,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:47,173 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2021-05-03 14:04:47,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:47,173 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:47,173 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:47,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-05-03 14:04:47,393 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:47,393 INFO L82 PathProgramCache]: Analyzing trace with hash -619671512, now seen corresponding path program 29 times [2021-05-03 14:04:47,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:47,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312943714] [2021-05-03 14:04:47,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:47,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312943714] [2021-05-03 14:04:47,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737670984] [2021-05-03 14:04:47,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:47,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:04:47,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:47,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:47,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:47,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:47,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:04:47,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811913483] [2021-05-03 14:04:47,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:47,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:47,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:47,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:47,480 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:47,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:47,570 INFO L93 Difference]: Finished difference Result 152 states and 318 transitions. [2021-05-03 14:04:47,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:04:47,570 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 [2021-05-03 14:04:47,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:47,571 INFO L225 Difference]: With dead ends: 152 [2021-05-03 14:04:47,571 INFO L226 Difference]: Without dead ends: 152 [2021-05-03 14:04:47,571 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:47,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-03 14:04:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 83. [2021-05-03 14:04:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.6463414634146343) internal successors, (217), 82 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:47,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 217 transitions. [2021-05-03 14:04:47,575 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 217 transitions. Word has length 15 [2021-05-03 14:04:47,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:47,576 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 217 transitions. [2021-05-03 14:04:47,576 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) [2021-05-03 14:04:47,576 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 217 transitions. [2021-05-03 14:04:47,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:47,576 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:47,576 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:47,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-03 14:04:47,781 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:47,781 INFO L82 PathProgramCache]: Analyzing trace with hash -707581453, now seen corresponding path program 30 times [2021-05-03 14:04:47,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:47,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609583753] [2021-05-03 14:04:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:47,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609583753] [2021-05-03 14:04:47,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209624549] [2021-05-03 14:04:47,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:47,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:04:47,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:47,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:47,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:47,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:47,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:04:47,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177127384] [2021-05-03 14:04:47,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:47,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:47,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:47,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:47,859 INFO L87 Difference]: Start difference. First operand 83 states and 217 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:47,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:47,962 INFO L93 Difference]: Finished difference Result 156 states and 340 transitions. [2021-05-03 14:04:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:47,962 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 [2021-05-03 14:04:47,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:47,962 INFO L225 Difference]: With dead ends: 156 [2021-05-03 14:04:47,962 INFO L226 Difference]: Without dead ends: 151 [2021-05-03 14:04:47,963 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:47,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-03 14:04:47,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 90. [2021-05-03 14:04:47,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.640449438202247) internal successors, (235), 89 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:47,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 235 transitions. [2021-05-03 14:04:47,966 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 235 transitions. Word has length 15 [2021-05-03 14:04:47,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:47,966 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 235 transitions. [2021-05-03 14:04:47,966 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) [2021-05-03 14:04:47,966 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 235 transitions. [2021-05-03 14:04:47,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:47,966 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:47,966 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:48,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-03 14:04:48,188 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:48,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:48,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1774821498, now seen corresponding path program 31 times [2021-05-03 14:04:48,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:48,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107337577] [2021-05-03 14:04:48,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:48,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107337577] [2021-05-03 14:04:48,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858417773] [2021-05-03 14:04:48,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:48,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:48,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:48,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:48,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 14:04:48,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814107478] [2021-05-03 14:04:48,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:04:48,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:48,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:04:48,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:48,276 INFO L87 Difference]: Start difference. First operand 90 states and 235 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:48,356 INFO L93 Difference]: Finished difference Result 119 states and 275 transitions. [2021-05-03 14:04:48,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:48,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:48,358 INFO L225 Difference]: With dead ends: 119 [2021-05-03 14:04:48,358 INFO L226 Difference]: Without dead ends: 115 [2021-05-03 14:04:48,358 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:48,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-03 14:04:48,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2021-05-03 14:04:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.5934065934065935) internal successors, (236), 91 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 236 transitions. [2021-05-03 14:04:48,361 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 236 transitions. Word has length 15 [2021-05-03 14:04:48,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:48,361 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 236 transitions. [2021-05-03 14:04:48,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 236 transitions. [2021-05-03 14:04:48,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:48,361 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:48,361 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:48,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-03 14:04:48,562 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:48,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:48,562 INFO L82 PathProgramCache]: Analyzing trace with hash 884121669, now seen corresponding path program 32 times [2021-05-03 14:04:48,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:48,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095544130] [2021-05-03 14:04:48,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:48,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095544130] [2021-05-03 14:04:48,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781325185] [2021-05-03 14:04:48,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:48,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:48,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:48,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:48,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:48,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:48,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 14:04:48,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71237850] [2021-05-03 14:04:48,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:04:48,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:48,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:04:48,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:48,652 INFO L87 Difference]: Start difference. First operand 92 states and 236 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:48,695 INFO L93 Difference]: Finished difference Result 156 states and 331 transitions. [2021-05-03 14:04:48,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:04:48,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:48,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:48,696 INFO L225 Difference]: With dead ends: 156 [2021-05-03 14:04:48,696 INFO L226 Difference]: Without dead ends: 156 [2021-05-03 14:04:48,696 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:48,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-03 14:04:48,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 89. [2021-05-03 14:04:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.5454545454545454) internal successors, (224), 88 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:48,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 224 transitions. [2021-05-03 14:04:48,699 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 224 transitions. Word has length 15 [2021-05-03 14:04:48,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:48,699 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 224 transitions. [2021-05-03 14:04:48,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 224 transitions. [2021-05-03 14:04:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:48,700 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:48,700 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:48,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-05-03 14:04:48,921 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:48,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:48,922 INFO L82 PathProgramCache]: Analyzing trace with hash 333838132, now seen corresponding path program 33 times [2021-05-03 14:04:48,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:48,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225002259] [2021-05-03 14:04:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:48,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225002259] [2021-05-03 14:04:48,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723735603] [2021-05-03 14:04:48,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:48,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:48,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:48,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:48,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:48,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:48,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:04:48,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119270272] [2021-05-03 14:04:48,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:04:48,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:48,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:04:48,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:48,991 INFO L87 Difference]: Start difference. First operand 89 states and 224 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:49,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:49,055 INFO L93 Difference]: Finished difference Result 126 states and 290 transitions. [2021-05-03 14:04:49,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:49,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:49,057 INFO L225 Difference]: With dead ends: 126 [2021-05-03 14:04:49,057 INFO L226 Difference]: Without dead ends: 122 [2021-05-03 14:04:49,057 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-03 14:04:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 89. [2021-05-03 14:04:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.534090909090909) internal successors, (223), 88 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2021-05-03 14:04:49,060 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 15 [2021-05-03 14:04:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:49,060 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2021-05-03 14:04:49,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2021-05-03 14:04:49,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:49,061 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:49,061 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:49,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-03 14:04:49,277 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:49,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:49,277 INFO L82 PathProgramCache]: Analyzing trace with hash -557483499, now seen corresponding path program 34 times [2021-05-03 14:04:49,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:49,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487548579] [2021-05-03 14:04:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:49,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487548579] [2021-05-03 14:04:49,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141156313] [2021-05-03 14:04:49,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:49,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:49,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:49,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:49,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:49,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:49,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:04:49,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210570768] [2021-05-03 14:04:49,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:04:49,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:49,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:04:49,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:49,366 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:49,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:49,416 INFO L93 Difference]: Finished difference Result 160 states and 342 transitions. [2021-05-03 14:04:49,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:04:49,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:49,417 INFO L225 Difference]: With dead ends: 160 [2021-05-03 14:04:49,417 INFO L226 Difference]: Without dead ends: 160 [2021-05-03 14:04:49,417 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-03 14:04:49,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 89. [2021-05-03 14:04:49,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.534090909090909) internal successors, (223), 88 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2021-05-03 14:04:49,420 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 15 [2021-05-03 14:04:49,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:49,420 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2021-05-03 14:04:49,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:49,420 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2021-05-03 14:04:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:49,421 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:49,421 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:49,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-03 14:04:49,633 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:49,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:49,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1708030232, now seen corresponding path program 35 times [2021-05-03 14:04:49,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:49,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121403457] [2021-05-03 14:04:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:49,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121403457] [2021-05-03 14:04:49,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100177930] [2021-05-03 14:04:49,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:49,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:04:49,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:49,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:49,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:49,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:49,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 14:04:49,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503277149] [2021-05-03 14:04:49,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:04:49,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:49,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:04:49,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:04:49,906 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:49,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:49,936 INFO L93 Difference]: Finished difference Result 180 states and 397 transitions. [2021-05-03 14:04:49,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:04:49,937 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:49,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:49,937 INFO L225 Difference]: With dead ends: 180 [2021-05-03 14:04:49,937 INFO L226 Difference]: Without dead ends: 180 [2021-05-03 14:04:49,938 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:49,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-03 14:04:49,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 97. [2021-05-03 14:04:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.6354166666666665) internal successors, (253), 96 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 253 transitions. [2021-05-03 14:04:49,941 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 253 transitions. Word has length 15 [2021-05-03 14:04:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:49,941 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 253 transitions. [2021-05-03 14:04:49,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:49,941 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 253 transitions. [2021-05-03 14:04:49,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:49,942 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:49,942 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:50,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-03 14:04:50,157 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:50,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:50,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1809787465, now seen corresponding path program 36 times [2021-05-03 14:04:50,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:50,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093688749] [2021-05-03 14:04:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:50,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093688749] [2021-05-03 14:04:50,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678126556] [2021-05-03 14:04:50,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:50,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:04:50,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:50,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:50,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:50,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:50,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 14:04:50,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914861962] [2021-05-03 14:04:50,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:04:50,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:50,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:04:50,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:04:50,229 INFO L87 Difference]: Start difference. First operand 97 states and 253 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:50,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:50,306 INFO L93 Difference]: Finished difference Result 152 states and 341 transitions. [2021-05-03 14:04:50,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:50,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:50,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:50,307 INFO L225 Difference]: With dead ends: 152 [2021-05-03 14:04:50,307 INFO L226 Difference]: Without dead ends: 150 [2021-05-03 14:04:50,308 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:50,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-03 14:04:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 103. [2021-05-03 14:04:50,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.676470588235294) internal successors, (273), 102 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:50,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 273 transitions. [2021-05-03 14:04:50,311 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 273 transitions. Word has length 15 [2021-05-03 14:04:50,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:50,312 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 273 transitions. [2021-05-03 14:04:50,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:50,312 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 273 transitions. [2021-05-03 14:04:50,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:50,312 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:50,312 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:50,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:50,528 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:50,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:50,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1944104694, now seen corresponding path program 37 times [2021-05-03 14:04:50,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:50,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931584529] [2021-05-03 14:04:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:50,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931584529] [2021-05-03 14:04:50,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267114362] [2021-05-03 14:04:50,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:50,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:50,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:50,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:50,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:04:50,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876794670] [2021-05-03 14:04:50,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:04:50,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:50,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:04:50,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:50,600 INFO L87 Difference]: Start difference. First operand 103 states and 273 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:50,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:50,676 INFO L93 Difference]: Finished difference Result 161 states and 375 transitions. [2021-05-03 14:04:50,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:50,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:50,677 INFO L225 Difference]: With dead ends: 161 [2021-05-03 14:04:50,677 INFO L226 Difference]: Without dead ends: 155 [2021-05-03 14:04:50,677 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:50,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-03 14:04:50,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 105. [2021-05-03 14:04:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6538461538461537) internal successors, (276), 104 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 276 transitions. [2021-05-03 14:04:50,681 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 276 transitions. Word has length 15 [2021-05-03 14:04:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:50,681 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 276 transitions. [2021-05-03 14:04:50,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:50,681 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 276 transitions. [2021-05-03 14:04:50,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:50,682 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:50,682 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:50,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:50,897 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:50,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1459540971, now seen corresponding path program 38 times [2021-05-03 14:04:50,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:50,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333290511] [2021-05-03 14:04:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:50,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333290511] [2021-05-03 14:04:50,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384056774] [2021-05-03 14:04:50,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:50,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:50,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:50,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:50,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:50,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:50,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:04:50,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48400357] [2021-05-03 14:04:50,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:04:50,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:50,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:04:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:50,980 INFO L87 Difference]: Start difference. First operand 105 states and 276 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:51,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:51,033 INFO L93 Difference]: Finished difference Result 156 states and 350 transitions. [2021-05-03 14:04:51,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:04:51,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:51,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:51,035 INFO L225 Difference]: With dead ends: 156 [2021-05-03 14:04:51,035 INFO L226 Difference]: Without dead ends: 156 [2021-05-03 14:04:51,035 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:51,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-03 14:04:51,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 99. [2021-05-03 14:04:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.6020408163265305) internal successors, (255), 98 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:51,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 255 transitions. [2021-05-03 14:04:51,038 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 255 transitions. Word has length 15 [2021-05-03 14:04:51,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:51,038 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 255 transitions. [2021-05-03 14:04:51,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:51,039 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 255 transitions. [2021-05-03 14:04:51,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:51,039 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:51,039 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:51,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:51,249 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:51,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:51,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1277777222, now seen corresponding path program 39 times [2021-05-03 14:04:51,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:51,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927807503] [2021-05-03 14:04:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:51,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927807503] [2021-05-03 14:04:51,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707439514] [2021-05-03 14:04:51,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:51,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:04:51,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:51,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:51,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:51,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:51,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:04:51,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094745199] [2021-05-03 14:04:51,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:51,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:51,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:51,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:51,350 INFO L87 Difference]: Start difference. First operand 99 states and 255 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:51,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:51,431 INFO L93 Difference]: Finished difference Result 165 states and 373 transitions. [2021-05-03 14:04:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:04:51,431 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 [2021-05-03 14:04:51,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:51,432 INFO L225 Difference]: With dead ends: 165 [2021-05-03 14:04:51,432 INFO L226 Difference]: Without dead ends: 159 [2021-05-03 14:04:51,432 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-03 14:04:51,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 103. [2021-05-03 14:04:51,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.5686274509803924) internal successors, (262), 102 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 262 transitions. [2021-05-03 14:04:51,436 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 262 transitions. Word has length 15 [2021-05-03 14:04:51,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:51,436 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 262 transitions. [2021-05-03 14:04:51,436 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) [2021-05-03 14:04:51,436 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 262 transitions. [2021-05-03 14:04:51,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:51,437 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:51,437 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:51,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-03 14:04:51,653 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:51,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:51,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1997396549, now seen corresponding path program 40 times [2021-05-03 14:04:51,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:51,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936276724] [2021-05-03 14:04:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:51,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936276724] [2021-05-03 14:04:51,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76543371] [2021-05-03 14:04:51,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:51,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:51,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:51,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:51,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:51,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:51,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:04:51,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232515325] [2021-05-03 14:04:51,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:51,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:51,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:51,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:51,761 INFO L87 Difference]: Start difference. First operand 103 states and 262 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:51,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:51,841 INFO L93 Difference]: Finished difference Result 164 states and 357 transitions. [2021-05-03 14:04:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:51,842 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 [2021-05-03 14:04:51,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:51,842 INFO L225 Difference]: With dead ends: 164 [2021-05-03 14:04:51,842 INFO L226 Difference]: Without dead ends: 164 [2021-05-03 14:04:51,843 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:51,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-03 14:04:51,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 101. [2021-05-03 14:04:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.56) internal successors, (256), 100 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:51,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 256 transitions. [2021-05-03 14:04:51,846 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 256 transitions. Word has length 15 [2021-05-03 14:04:51,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:51,846 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 256 transitions. [2021-05-03 14:04:51,846 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) [2021-05-03 14:04:51,846 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 256 transitions. [2021-05-03 14:04:51,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:51,846 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:51,846 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:52,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-03 14:04:52,069 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:52,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:52,069 INFO L82 PathProgramCache]: Analyzing trace with hash 690186194, now seen corresponding path program 41 times [2021-05-03 14:04:52,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:52,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712438510] [2021-05-03 14:04:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:52,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712438510] [2021-05-03 14:04:52,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784658245] [2021-05-03 14:04:52,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:52,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:04:52,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:52,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:52,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:52,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:52,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:04:52,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302358525] [2021-05-03 14:04:52,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:04:52,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:52,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:04:52,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:52,151 INFO L87 Difference]: Start difference. First operand 101 states and 256 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:52,186 INFO L93 Difference]: Finished difference Result 205 states and 458 transitions. [2021-05-03 14:04:52,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:04:52,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:52,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:52,187 INFO L225 Difference]: With dead ends: 205 [2021-05-03 14:04:52,187 INFO L226 Difference]: Without dead ends: 205 [2021-05-03 14:04:52,187 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:52,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-03 14:04:52,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 119. [2021-05-03 14:04:52,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.73728813559322) internal successors, (323), 118 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 323 transitions. [2021-05-03 14:04:52,191 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 323 transitions. Word has length 15 [2021-05-03 14:04:52,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:52,191 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 323 transitions. [2021-05-03 14:04:52,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,191 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 323 transitions. [2021-05-03 14:04:52,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:52,191 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:52,191 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:52,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-03 14:04:52,405 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:52,405 INFO L82 PathProgramCache]: Analyzing trace with hash -86963405, now seen corresponding path program 42 times [2021-05-03 14:04:52,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:52,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39907420] [2021-05-03 14:04:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:52,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39907420] [2021-05-03 14:04:52,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488125232] [2021-05-03 14:04:52,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:52,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:04:52,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:52,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:52,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:52,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:52,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:04:52,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287071903] [2021-05-03 14:04:52,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:04:52,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:52,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:04:52,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:52,482 INFO L87 Difference]: Start difference. First operand 119 states and 323 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:52,561 INFO L93 Difference]: Finished difference Result 198 states and 459 transitions. [2021-05-03 14:04:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:52,562 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:52,563 INFO L225 Difference]: With dead ends: 198 [2021-05-03 14:04:52,563 INFO L226 Difference]: Without dead ends: 196 [2021-05-03 14:04:52,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:52,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-03 14:04:52,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 128. [2021-05-03 14:04:52,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.811023622047244) internal successors, (357), 127 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 357 transitions. [2021-05-03 14:04:52,567 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 357 transitions. Word has length 15 [2021-05-03 14:04:52,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:52,567 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 357 transitions. [2021-05-03 14:04:52,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,567 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 357 transitions. [2021-05-03 14:04:52,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:52,567 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:52,567 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:52,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-03 14:04:52,781 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:52,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:52,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1035293264, now seen corresponding path program 43 times [2021-05-03 14:04:52,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:52,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092942926] [2021-05-03 14:04:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:52,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092942926] [2021-05-03 14:04:52,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660629378] [2021-05-03 14:04:52,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:52,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:52,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:52,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:52,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:04:52,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647552284] [2021-05-03 14:04:52,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:04:52,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:52,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:04:52,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:52,872 INFO L87 Difference]: Start difference. First operand 128 states and 357 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:52,937 INFO L93 Difference]: Finished difference Result 206 states and 478 transitions. [2021-05-03 14:04:52,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:52,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:52,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:52,938 INFO L225 Difference]: With dead ends: 206 [2021-05-03 14:04:52,938 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 14:04:52,938 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:52,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 14:04:52,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 128. [2021-05-03 14:04:52,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.8031496062992125) internal successors, (356), 127 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 356 transitions. [2021-05-03 14:04:52,942 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 356 transitions. Word has length 15 [2021-05-03 14:04:52,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:52,942 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 356 transitions. [2021-05-03 14:04:52,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,942 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 356 transitions. [2021-05-03 14:04:52,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:52,943 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:52,943 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:53,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:53,165 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:53,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:53,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1623649903, now seen corresponding path program 44 times [2021-05-03 14:04:53,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:53,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477910586] [2021-05-03 14:04:53,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:53,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477910586] [2021-05-03 14:04:53,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079105369] [2021-05-03 14:04:53,198 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 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 [2021-05-03 14:04:53,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:53,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:53,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:53,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:53,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:53,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:04:53,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594740919] [2021-05-03 14:04:53,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:04:53,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:53,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:04:53,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:53,242 INFO L87 Difference]: Start difference. First operand 128 states and 356 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:53,278 INFO L93 Difference]: Finished difference Result 187 states and 443 transitions. [2021-05-03 14:04:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:04:53,278 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:53,279 INFO L225 Difference]: With dead ends: 187 [2021-05-03 14:04:53,279 INFO L226 Difference]: Without dead ends: 187 [2021-05-03 14:04:53,279 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:53,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-03 14:04:53,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 129. [2021-05-03 14:04:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.7890625) internal successors, (357), 128 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 357 transitions. [2021-05-03 14:04:53,282 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 357 transitions. Word has length 15 [2021-05-03 14:04:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:53,282 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 357 transitions. [2021-05-03 14:04:53,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 357 transitions. [2021-05-03 14:04:53,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:53,282 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:53,282 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:53,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-03 14:04:53,489 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:53,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:53,494 INFO L82 PathProgramCache]: Analyzing trace with hash 454111732, now seen corresponding path program 45 times [2021-05-03 14:04:53,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:53,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796934842] [2021-05-03 14:04:53,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:53,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796934842] [2021-05-03 14:04:53,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764183579] [2021-05-03 14:04:53,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:53,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:04:53,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:53,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:53,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:53,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:53,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:04:53,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097800393] [2021-05-03 14:04:53,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:04:53,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:53,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:04:53,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:53,581 INFO L87 Difference]: Start difference. First operand 129 states and 357 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:53,639 INFO L93 Difference]: Finished difference Result 215 states and 521 transitions. [2021-05-03 14:04:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:53,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:53,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:53,640 INFO L225 Difference]: With dead ends: 215 [2021-05-03 14:04:53,640 INFO L226 Difference]: Without dead ends: 211 [2021-05-03 14:04:53,640 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:53,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-03 14:04:53,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 129. [2021-05-03 14:04:53,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.78125) internal successors, (356), 128 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:53,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 356 transitions. [2021-05-03 14:04:53,644 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 356 transitions. Word has length 15 [2021-05-03 14:04:53,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:53,644 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 356 transitions. [2021-05-03 14:04:53,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:53,644 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 356 transitions. [2021-05-03 14:04:53,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:53,644 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:53,644 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:53,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-05-03 14:04:53,860 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:53,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:53,860 INFO L82 PathProgramCache]: Analyzing trace with hash -437209899, now seen corresponding path program 46 times [2021-05-03 14:04:53,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:53,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18748230] [2021-05-03 14:04:53,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:53,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18748230] [2021-05-03 14:04:53,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497509821] [2021-05-03 14:04:53,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:53,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:53,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:53,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:53,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:53,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:53,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:04:53,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161559662] [2021-05-03 14:04:53,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:04:53,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:53,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:04:53,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:04:53,935 INFO L87 Difference]: Start difference. First operand 129 states and 356 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:53,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:53,975 INFO L93 Difference]: Finished difference Result 166 states and 422 transitions. [2021-05-03 14:04:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:04:53,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:53,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:53,976 INFO L225 Difference]: With dead ends: 166 [2021-05-03 14:04:53,976 INFO L226 Difference]: Without dead ends: 166 [2021-05-03 14:04:53,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:53,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-03 14:04:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 135. [2021-05-03 14:04:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.791044776119403) internal successors, (374), 134 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2021-05-03 14:04:53,979 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 15 [2021-05-03 14:04:53,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:53,980 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2021-05-03 14:04:53,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2021-05-03 14:04:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:53,980 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:53,980 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:54,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:54,193 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:54,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:54,193 INFO L82 PathProgramCache]: Analyzing trace with hash -618973648, now seen corresponding path program 47 times [2021-05-03 14:04:54,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:54,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687226368] [2021-05-03 14:04:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:54,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687226368] [2021-05-03 14:04:54,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226986024] [2021-05-03 14:04:54,220 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 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 [2021-05-03 14:04:54,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:04:54,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:54,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:54,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:54,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:54,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:04:54,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722094732] [2021-05-03 14:04:54,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:54,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:54,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:54,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:54,266 INFO L87 Difference]: Start difference. First operand 135 states and 374 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:54,335 INFO L93 Difference]: Finished difference Result 217 states and 530 transitions. [2021-05-03 14:04:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:54,335 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:54,336 INFO L225 Difference]: With dead ends: 217 [2021-05-03 14:04:54,336 INFO L226 Difference]: Without dead ends: 211 [2021-05-03 14:04:54,336 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:54,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-03 14:04:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 142. [2021-05-03 14:04:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8297872340425534) internal successors, (399), 141 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 399 transitions. [2021-05-03 14:04:54,340 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 399 transitions. Word has length 15 [2021-05-03 14:04:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:54,340 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 399 transitions. [2021-05-03 14:04:54,340 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) [2021-05-03 14:04:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 399 transitions. [2021-05-03 14:04:54,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:54,341 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:54,341 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:54,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:54,557 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:54,557 INFO L82 PathProgramCache]: Analyzing trace with hash 100645679, now seen corresponding path program 48 times [2021-05-03 14:04:54,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:54,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496233639] [2021-05-03 14:04:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:54,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496233639] [2021-05-03 14:04:54,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620639602] [2021-05-03 14:04:54,590 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:54,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:04:54,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:54,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:54,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:54,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:54,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:04:54,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295628588] [2021-05-03 14:04:54,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:54,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:54,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:54,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:54,655 INFO L87 Difference]: Start difference. First operand 142 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:54,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:54,739 INFO L93 Difference]: Finished difference Result 184 states and 467 transitions. [2021-05-03 14:04:54,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:04:54,739 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:54,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:54,740 INFO L225 Difference]: With dead ends: 184 [2021-05-03 14:04:54,740 INFO L226 Difference]: Without dead ends: 184 [2021-05-03 14:04:54,740 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:54,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-03 14:04:54,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 142. [2021-05-03 14:04:54,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8297872340425534) internal successors, (399), 141 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:54,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 399 transitions. [2021-05-03 14:04:54,743 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 399 transitions. Word has length 15 [2021-05-03 14:04:54,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:54,743 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 399 transitions. [2021-05-03 14:04:54,743 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) [2021-05-03 14:04:54,744 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 399 transitions. [2021-05-03 14:04:54,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:54,744 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:54,744 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:54,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:54,957 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:54,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:54,957 INFO L82 PathProgramCache]: Analyzing trace with hash 475117940, now seen corresponding path program 49 times [2021-05-03 14:04:54,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:54,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48601816] [2021-05-03 14:04:54,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:54,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48601816] [2021-05-03 14:04:54,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519627353] [2021-05-03 14:04:54,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:55,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:55,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:55,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:55,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:04:55,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841683805] [2021-05-03 14:04:55,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:55,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:55,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:55,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:55,049 INFO L87 Difference]: Start difference. First operand 142 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:55,098 INFO L93 Difference]: Finished difference Result 186 states and 481 transitions. [2021-05-03 14:04:55,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:55,099 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:55,099 INFO L225 Difference]: With dead ends: 186 [2021-05-03 14:04:55,099 INFO L226 Difference]: Without dead ends: 178 [2021-05-03 14:04:55,100 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:55,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-03 14:04:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 140. [2021-05-03 14:04:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.841726618705036) internal successors, (395), 139 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 395 transitions. [2021-05-03 14:04:55,103 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 395 transitions. Word has length 15 [2021-05-03 14:04:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:55,103 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 395 transitions. [2021-05-03 14:04:55,103 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) [2021-05-03 14:04:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 395 transitions. [2021-05-03 14:04:55,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:55,103 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:55,103 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:55,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-05-03 14:04:55,314 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:55,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:55,315 INFO L82 PathProgramCache]: Analyzing trace with hash -405700587, now seen corresponding path program 50 times [2021-05-03 14:04:55,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:55,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385650016] [2021-05-03 14:04:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:55,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385650016] [2021-05-03 14:04:55,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994668600] [2021-05-03 14:04:55,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:55,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:55,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:55,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:04:55,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:55,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:55,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:04:55,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393438960] [2021-05-03 14:04:55,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:55,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:55,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:55,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:55,431 INFO L87 Difference]: Start difference. First operand 140 states and 395 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:55,513 INFO L93 Difference]: Finished difference Result 189 states and 494 transitions. [2021-05-03 14:04:55,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:55,513 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:55,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:55,514 INFO L225 Difference]: With dead ends: 189 [2021-05-03 14:04:55,514 INFO L226 Difference]: Without dead ends: 189 [2021-05-03 14:04:55,515 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-03 14:04:55,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2021-05-03 14:04:55,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.8299319727891157) internal successors, (416), 147 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:55,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 416 transitions. [2021-05-03 14:04:55,520 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 416 transitions. Word has length 15 [2021-05-03 14:04:55,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:55,520 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 416 transitions. [2021-05-03 14:04:55,520 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) [2021-05-03 14:04:55,520 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 416 transitions. [2021-05-03 14:04:55,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:55,521 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:55,521 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:55,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-03 14:04:55,737 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:55,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:55,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1204336263, now seen corresponding path program 51 times [2021-05-03 14:04:55,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:55,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685935154] [2021-05-03 14:04:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:55,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685935154] [2021-05-03 14:04:55,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562141763] [2021-05-03 14:04:55,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:55,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:04:55,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:55,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:04:55,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:56,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:56,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:04:56,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:56,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:56,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:56,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:04:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:56,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:56,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:04:56,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392361358] [2021-05-03 14:04:56,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:04:56,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:56,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:04:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:04:56,050 INFO L87 Difference]: Start difference. First operand 148 states and 416 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:56,279 INFO L93 Difference]: Finished difference Result 205 states and 527 transitions. [2021-05-03 14:04:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:56,279 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:56,280 INFO L225 Difference]: With dead ends: 205 [2021-05-03 14:04:56,280 INFO L226 Difference]: Without dead ends: 178 [2021-05-03 14:04:56,281 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 261.5ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:56,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-03 14:04:56,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 158. [2021-05-03 14:04:56,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8343949044585988) internal successors, (445), 157 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:56,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 445 transitions. [2021-05-03 14:04:56,284 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 445 transitions. Word has length 16 [2021-05-03 14:04:56,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:56,284 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 445 transitions. [2021-05-03 14:04:56,284 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) [2021-05-03 14:04:56,284 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 445 transitions. [2021-05-03 14:04:56,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:56,285 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:56,285 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:56,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-03 14:04:56,485 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:56,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:56,486 INFO L82 PathProgramCache]: Analyzing trace with hash 387366859, now seen corresponding path program 52 times [2021-05-03 14:04:56,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:56,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644867554] [2021-05-03 14:04:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:56,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644867554] [2021-05-03 14:04:56,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626402020] [2021-05-03 14:04:56,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:56,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:56,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:56,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:04:56,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:56,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:56,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:04:56,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:56,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:56,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:56,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:04:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:56,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:56,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:04:56,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429143027] [2021-05-03 14:04:56,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:04:56,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:56,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:04:56,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:56,825 INFO L87 Difference]: Start difference. First operand 158 states and 445 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:57,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:57,043 INFO L93 Difference]: Finished difference Result 218 states and 567 transitions. [2021-05-03 14:04:57,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:57,044 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:57,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:57,044 INFO L225 Difference]: With dead ends: 218 [2021-05-03 14:04:57,044 INFO L226 Difference]: Without dead ends: 202 [2021-05-03 14:04:57,044 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:57,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-03 14:04:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 169. [2021-05-03 14:04:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.875) internal successors, (483), 168 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 483 transitions. [2021-05-03 14:04:57,048 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 483 transitions. Word has length 16 [2021-05-03 14:04:57,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:57,048 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 483 transitions. [2021-05-03 14:04:57,048 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) [2021-05-03 14:04:57,048 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 483 transitions. [2021-05-03 14:04:57,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:57,049 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:57,049 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:57,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-03 14:04:57,269 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:57,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:57,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1246241389, now seen corresponding path program 53 times [2021-05-03 14:04:57,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:57,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579937638] [2021-05-03 14:04:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:57,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579937638] [2021-05-03 14:04:57,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99562158] [2021-05-03 14:04:57,335 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:57,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:04:57,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:57,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:04:57,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:57,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:57,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:04:57,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:04:57,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:57,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:04:57,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:57,681 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:04:57,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:04:57,682 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:04:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:57,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:57,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:04:57,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292675479] [2021-05-03 14:04:57,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:04:57,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:57,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:04:57,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:57,714 INFO L87 Difference]: Start difference. First operand 169 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:57,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:57,884 INFO L93 Difference]: Finished difference Result 234 states and 603 transitions. [2021-05-03 14:04:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:04:57,884 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:57,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:57,885 INFO L225 Difference]: With dead ends: 234 [2021-05-03 14:04:57,885 INFO L226 Difference]: Without dead ends: 224 [2021-05-03 14:04:57,885 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 218.5ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:57,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-03 14:04:57,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 169. [2021-05-03 14:04:57,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.875) internal successors, (483), 168 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:57,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 483 transitions. [2021-05-03 14:04:57,889 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 483 transitions. Word has length 16 [2021-05-03 14:04:57,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:57,889 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 483 transitions. [2021-05-03 14:04:57,889 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) [2021-05-03 14:04:57,890 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 483 transitions. [2021-05-03 14:04:57,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:57,890 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:57,890 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:58,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:58,104 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:58,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:58,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1054238309, now seen corresponding path program 54 times [2021-05-03 14:04:58,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:58,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13154135] [2021-05-03 14:04:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:58,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13154135] [2021-05-03 14:04:58,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207233788] [2021-05-03 14:04:58,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:58,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:04:58,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:58,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:04:58,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:58,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:58,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:04:58,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:58,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:58,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:58,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:04:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:58,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:58,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:04:58,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458125796] [2021-05-03 14:04:58,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:04:58,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:58,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:04:58,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:58,443 INFO L87 Difference]: Start difference. First operand 169 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:58,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:58,629 INFO L93 Difference]: Finished difference Result 232 states and 635 transitions. [2021-05-03 14:04:58,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:58,630 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:58,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:58,631 INFO L225 Difference]: With dead ends: 232 [2021-05-03 14:04:58,631 INFO L226 Difference]: Without dead ends: 216 [2021-05-03 14:04:58,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-03 14:04:58,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 188. [2021-05-03 14:04:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9411764705882355) internal successors, (550), 187 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 550 transitions. [2021-05-03 14:04:58,636 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 550 transitions. Word has length 16 [2021-05-03 14:04:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:58,636 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 550 transitions. [2021-05-03 14:04:58,636 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) [2021-05-03 14:04:58,636 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 550 transitions. [2021-05-03 14:04:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:58,637 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:58,637 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:58,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-05-03 14:04:58,853 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:58,853 INFO L82 PathProgramCache]: Analyzing trace with hash -195363779, now seen corresponding path program 55 times [2021-05-03 14:04:58,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:58,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179774989] [2021-05-03 14:04:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:58,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179774989] [2021-05-03 14:04:58,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536934644] [2021-05-03 14:04:58,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:58,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:04:58,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:59,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:59,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:04:59,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:04:59,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:59,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:04:59,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:59,243 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:04:59,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:04:59,244 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:04:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:59,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:59,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:04:59,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449665119] [2021-05-03 14:04:59,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:04:59,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:59,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:04:59,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:59,276 INFO L87 Difference]: Start difference. First operand 188 states and 550 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:59,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:59,567 INFO L93 Difference]: Finished difference Result 263 states and 691 transitions. [2021-05-03 14:04:59,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:04:59,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:59,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:59,568 INFO L225 Difference]: With dead ends: 263 [2021-05-03 14:04:59,568 INFO L226 Difference]: Without dead ends: 244 [2021-05-03 14:04:59,568 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:04:59,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-03 14:04:59,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 186. [2021-05-03 14:04:59,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.918918918918919) internal successors, (540), 185 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:59,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 540 transitions. [2021-05-03 14:04:59,576 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 540 transitions. Word has length 16 [2021-05-03 14:04:59,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:59,576 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 540 transitions. [2021-05-03 14:04:59,577 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) [2021-05-03 14:04:59,577 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 540 transitions. [2021-05-03 14:04:59,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:59,577 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:59,577 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:59,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:59,793 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:59,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:59,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1515249529, now seen corresponding path program 56 times [2021-05-03 14:04:59,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:59,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238050928] [2021-05-03 14:04:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:59,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238050928] [2021-05-03 14:04:59,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366129067] [2021-05-03 14:04:59,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:59,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:59,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:59,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:04:59,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:00,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:00,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:05:00,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:05:00,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:00,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:00,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:00,244 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:05:00,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:05:00,245 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:05:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:00,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:00,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:00,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928110604] [2021-05-03 14:05:00,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:00,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:00,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:00,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:00,279 INFO L87 Difference]: Start difference. First operand 186 states and 540 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:00,544 INFO L93 Difference]: Finished difference Result 229 states and 625 transitions. [2021-05-03 14:05:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:05:00,544 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:00,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:00,545 INFO L225 Difference]: With dead ends: 229 [2021-05-03 14:05:00,545 INFO L226 Difference]: Without dead ends: 219 [2021-05-03 14:05:00,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-03 14:05:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 187. [2021-05-03 14:05:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9193548387096775) internal successors, (543), 186 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 543 transitions. [2021-05-03 14:05:00,549 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 543 transitions. Word has length 16 [2021-05-03 14:05:00,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:00,549 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 543 transitions. [2021-05-03 14:05:00,549 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) [2021-05-03 14:05:00,549 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 543 transitions. [2021-05-03 14:05:00,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:00,550 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:00,550 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:00,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:00,772 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:00,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:00,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1313032655, now seen corresponding path program 57 times [2021-05-03 14:05:00,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:00,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289128489] [2021-05-03 14:05:00,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:00,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289128489] [2021-05-03 14:05:00,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167477331] [2021-05-03 14:05:00,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:00,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:05:00,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:00,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:00,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:01,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:01,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:01,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:01,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:01,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:01,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:05:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:01,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:01,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-05-03 14:05:01,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073446781] [2021-05-03 14:05:01,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:05:01,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:01,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:05:01,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:05:01,078 INFO L87 Difference]: Start difference. First operand 187 states and 543 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:01,241 INFO L93 Difference]: Finished difference Result 208 states and 572 transitions. [2021-05-03 14:05:01,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:01,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:01,242 INFO L225 Difference]: With dead ends: 208 [2021-05-03 14:05:01,242 INFO L226 Difference]: Without dead ends: 190 [2021-05-03 14:05:01,242 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:01,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-03 14:05:01,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2021-05-03 14:05:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.913978494623656) internal successors, (542), 186 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 542 transitions. [2021-05-03 14:05:01,245 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 542 transitions. Word has length 16 [2021-05-03 14:05:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:01,245 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 542 transitions. [2021-05-03 14:05:01,245 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) [2021-05-03 14:05:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 542 transitions. [2021-05-03 14:05:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:01,246 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:01,246 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:01,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:01,467 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:01,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:01,467 INFO L82 PathProgramCache]: Analyzing trace with hash -762693297, now seen corresponding path program 58 times [2021-05-03 14:05:01,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:01,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102214459] [2021-05-03 14:05:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:01,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102214459] [2021-05-03 14:05:01,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834168884] [2021-05-03 14:05:01,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:01,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:01,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:01,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:01,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:01,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:01,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:05:01,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:05:01,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:01,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:01,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:01,822 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:05:01,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:05:01,823 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:05:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:01,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:01,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:01,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081935249] [2021-05-03 14:05:01,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:01,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:01,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:01,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:01,853 INFO L87 Difference]: Start difference. First operand 187 states and 542 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:02,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:02,156 INFO L93 Difference]: Finished difference Result 260 states and 675 transitions. [2021-05-03 14:05:02,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:02,156 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:02,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:02,157 INFO L225 Difference]: With dead ends: 260 [2021-05-03 14:05:02,157 INFO L226 Difference]: Without dead ends: 250 [2021-05-03 14:05:02,157 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 285.4ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:05:02,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-03 14:05:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 191. [2021-05-03 14:05:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.8842105263157896) internal successors, (548), 190 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 548 transitions. [2021-05-03 14:05:02,164 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 548 transitions. Word has length 16 [2021-05-03 14:05:02,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:02,164 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 548 transitions. [2021-05-03 14:05:02,164 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) [2021-05-03 14:05:02,164 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 548 transitions. [2021-05-03 14:05:02,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:02,165 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:02,165 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:02,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:02,381 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:02,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1500641739, now seen corresponding path program 59 times [2021-05-03 14:05:02,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:02,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244978571] [2021-05-03 14:05:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:02,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244978571] [2021-05-03 14:05:02,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723023827] [2021-05-03 14:05:02,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:02,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:05:02,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:02,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:02,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:02,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:02,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:02,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:02,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:02,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:02,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:05:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:02,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:02,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:02,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909867766] [2021-05-03 14:05:02,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:02,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:02,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:02,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:02,712 INFO L87 Difference]: Start difference. First operand 191 states and 548 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:02,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:02,969 INFO L93 Difference]: Finished difference Result 264 states and 729 transitions. [2021-05-03 14:05:02,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:02,969 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:02,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:02,970 INFO L225 Difference]: With dead ends: 264 [2021-05-03 14:05:02,970 INFO L226 Difference]: Without dead ends: 246 [2021-05-03 14:05:02,970 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 226.5ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:05:02,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-03 14:05:02,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 216. [2021-05-03 14:05:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.9488372093023254) internal successors, (634), 215 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 634 transitions. [2021-05-03 14:05:02,975 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 634 transitions. Word has length 16 [2021-05-03 14:05:02,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:02,975 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 634 transitions. [2021-05-03 14:05:02,975 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) [2021-05-03 14:05:02,975 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 634 transitions. [2021-05-03 14:05:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:02,975 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:02,976 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:03,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:03,189 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:03,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:03,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1935451027, now seen corresponding path program 60 times [2021-05-03 14:05:03,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:03,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110646548] [2021-05-03 14:05:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:03,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110646548] [2021-05-03 14:05:03,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28061139] [2021-05-03 14:05:03,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:03,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:05:03,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:03,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:03,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:03,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:03,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:05:03,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:05:03,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:03,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:03,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:03,551 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:05:03,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:05:03,551 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:05:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:03,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:03,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:03,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483677699] [2021-05-03 14:05:03,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:03,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:03,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:03,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:03,586 INFO L87 Difference]: Start difference. First operand 216 states and 634 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:04,066 INFO L93 Difference]: Finished difference Result 318 states and 837 transitions. [2021-05-03 14:05:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:04,066 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:04,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:04,068 INFO L225 Difference]: With dead ends: 318 [2021-05-03 14:05:04,068 INFO L226 Difference]: Without dead ends: 292 [2021-05-03 14:05:04,068 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 341.6ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:05:04,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-05-03 14:05:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 218. [2021-05-03 14:05:04,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.944700460829493) internal successors, (639), 217 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 639 transitions. [2021-05-03 14:05:04,072 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 639 transitions. Word has length 16 [2021-05-03 14:05:04,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:04,073 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 639 transitions. [2021-05-03 14:05:04,073 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) [2021-05-03 14:05:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 639 transitions. [2021-05-03 14:05:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:04,073 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:04,073 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:04,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-05-03 14:05:04,289 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:04,289 INFO L82 PathProgramCache]: Analyzing trace with hash -224837719, now seen corresponding path program 61 times [2021-05-03 14:05:04,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:04,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055480969] [2021-05-03 14:05:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:04,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055480969] [2021-05-03 14:05:04,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692381399] [2021-05-03 14:05:04,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:05:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:04,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:04,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:04,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:04,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:05:04,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:05:04,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:04,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:04,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:04,704 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:05:04,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:05:04,704 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:05:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:04,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:04,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:04,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932497221] [2021-05-03 14:05:04,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:04,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:04,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:04,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:04,731 INFO L87 Difference]: Start difference. First operand 218 states and 639 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:05,235 INFO L93 Difference]: Finished difference Result 355 states and 911 transitions. [2021-05-03 14:05:05,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:05,235 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:05,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:05,236 INFO L225 Difference]: With dead ends: 355 [2021-05-03 14:05:05,236 INFO L226 Difference]: Without dead ends: 322 [2021-05-03 14:05:05,236 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 402.8ms TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:05:05,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-03 14:05:05,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 210. [2021-05-03 14:05:05,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.909090909090909) internal successors, (608), 209 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 608 transitions. [2021-05-03 14:05:05,242 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 608 transitions. Word has length 16 [2021-05-03 14:05:05,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:05,243 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 608 transitions. [2021-05-03 14:05:05,243 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) [2021-05-03 14:05:05,243 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 608 transitions. [2021-05-03 14:05:05,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:05,243 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:05,243 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:05,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-05-03 14:05:05,448 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:05,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:05,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1264567277, now seen corresponding path program 62 times [2021-05-03 14:05:05,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:05,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001046942] [2021-05-03 14:05:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:05,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001046942] [2021-05-03 14:05:05,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859571408] [2021-05-03 14:05:05,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:05,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:05,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:05,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:05,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:05,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:05,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:05:05,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:05:05,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:05,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:05,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:05,872 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:05:05,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:05:05,873 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:05:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:05,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:05,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:05,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514438069] [2021-05-03 14:05:05,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:05,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:05,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:05,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:05,903 INFO L87 Difference]: Start difference. First operand 210 states and 608 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:06,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:06,236 INFO L93 Difference]: Finished difference Result 275 states and 745 transitions. [2021-05-03 14:05:06,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:05:06,236 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:06,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:06,237 INFO L225 Difference]: With dead ends: 275 [2021-05-03 14:05:06,237 INFO L226 Difference]: Without dead ends: 265 [2021-05-03 14:05:06,237 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 354.2ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:05:06,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-03 14:05:06,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 211. [2021-05-03 14:05:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9095238095238094) internal successors, (611), 210 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 611 transitions. [2021-05-03 14:05:06,241 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 611 transitions. Word has length 16 [2021-05-03 14:05:06,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:06,241 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 611 transitions. [2021-05-03 14:05:06,242 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) [2021-05-03 14:05:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 611 transitions. [2021-05-03 14:05:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:06,242 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:06,242 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:06,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-05-03 14:05:06,465 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:06,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:06,465 INFO L82 PathProgramCache]: Analyzing trace with hash -583718215, now seen corresponding path program 63 times [2021-05-03 14:05:06,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:06,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988214942] [2021-05-03 14:05:06,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:06,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988214942] [2021-05-03 14:05:06,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094151901] [2021-05-03 14:05:06,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:06,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:05:06,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:06,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:06,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:06,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:06,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:06,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:06,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:06,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:06,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:05:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:06,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:06,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:06,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139468743] [2021-05-03 14:05:06,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:06,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:06,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:06,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:06,779 INFO L87 Difference]: Start difference. First operand 211 states and 611 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:06,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:06,965 INFO L93 Difference]: Finished difference Result 238 states and 653 transitions. [2021-05-03 14:05:06,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:06,965 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:06,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:06,966 INFO L225 Difference]: With dead ends: 238 [2021-05-03 14:05:06,966 INFO L226 Difference]: Without dead ends: 220 [2021-05-03 14:05:06,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:06,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-03 14:05:06,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 211. [2021-05-03 14:05:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9047619047619047) internal successors, (610), 210 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:06,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 610 transitions. [2021-05-03 14:05:06,970 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 610 transitions. Word has length 16 [2021-05-03 14:05:06,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:06,970 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 610 transitions. [2021-05-03 14:05:06,970 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) [2021-05-03 14:05:06,971 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 610 transitions. [2021-05-03 14:05:06,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:06,971 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:06,971 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:07,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-05-03 14:05:07,185 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:07,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:07,185 INFO L82 PathProgramCache]: Analyzing trace with hash -632183593, now seen corresponding path program 64 times [2021-05-03 14:05:07,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:07,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226484470] [2021-05-03 14:05:07,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:07,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226484470] [2021-05-03 14:05:07,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998676391] [2021-05-03 14:05:07,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:07,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:07,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:07,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:07,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:07,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:07,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:05:07,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:05:07,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:07,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:07,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:07,585 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:05:07,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:05:07,586 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:05:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:07,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:07,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:07,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059230881] [2021-05-03 14:05:07,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:07,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:07,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:07,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:07,625 INFO L87 Difference]: Start difference. First operand 211 states and 610 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:08,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:08,020 INFO L93 Difference]: Finished difference Result 298 states and 793 transitions. [2021-05-03 14:05:08,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:05:08,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:08,021 INFO L225 Difference]: With dead ends: 298 [2021-05-03 14:05:08,021 INFO L226 Difference]: Without dead ends: 288 [2021-05-03 14:05:08,022 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 430.6ms TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:05:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-05-03 14:05:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 213. [2021-05-03 14:05:08,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.910377358490566) internal successors, (617), 212 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:08,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 617 transitions. [2021-05-03 14:05:08,026 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 617 transitions. Word has length 16 [2021-05-03 14:05:08,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:08,026 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 617 transitions. [2021-05-03 14:05:08,026 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) [2021-05-03 14:05:08,026 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 617 transitions. [2021-05-03 14:05:08,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:08,026 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:08,027 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:08,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-05-03 14:05:08,233 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:08,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:08,233 INFO L82 PathProgramCache]: Analyzing trace with hash -902455397, now seen corresponding path program 65 times [2021-05-03 14:05:08,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:08,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757359230] [2021-05-03 14:05:08,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:08,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757359230] [2021-05-03 14:05:08,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658787075] [2021-05-03 14:05:08,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:08,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:05:08,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:08,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:08,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:08,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:08,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:08,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:08,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:08,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:08,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:05:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:08,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:08,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:08,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099086668] [2021-05-03 14:05:08,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:08,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:08,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:08,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:08,545 INFO L87 Difference]: Start difference. First operand 213 states and 617 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:08,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:08,785 INFO L93 Difference]: Finished difference Result 275 states and 774 transitions. [2021-05-03 14:05:08,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:08,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:08,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:08,786 INFO L225 Difference]: With dead ends: 275 [2021-05-03 14:05:08,786 INFO L226 Difference]: Without dead ends: 259 [2021-05-03 14:05:08,786 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:05:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-05-03 14:05:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 241. [2021-05-03 14:05:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.9625) internal successors, (711), 240 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 711 transitions. [2021-05-03 14:05:08,790 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 711 transitions. Word has length 16 [2021-05-03 14:05:08,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:08,790 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 711 transitions. [2021-05-03 14:05:08,790 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) [2021-05-03 14:05:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 711 transitions. [2021-05-03 14:05:08,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:08,791 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:08,791 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:09,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-05-03 14:05:09,012 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:09,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:09,012 INFO L82 PathProgramCache]: Analyzing trace with hash -43580867, now seen corresponding path program 66 times [2021-05-03 14:05:09,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:09,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763975534] [2021-05-03 14:05:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:09,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763975534] [2021-05-03 14:05:09,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007423498] [2021-05-03 14:05:09,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:09,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:05:09,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:09,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:09,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:09,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:09,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:05:09,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:05:09,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:09,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:09,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:09,406 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:05:09,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:05:09,407 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:05:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:09,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:09,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:09,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830720123] [2021-05-03 14:05:09,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:09,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:09,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:09,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:09,437 INFO L87 Difference]: Start difference. First operand 241 states and 711 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:09,930 INFO L93 Difference]: Finished difference Result 332 states and 894 transitions. [2021-05-03 14:05:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:05:09,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:09,932 INFO L225 Difference]: With dead ends: 332 [2021-05-03 14:05:09,932 INFO L226 Difference]: Without dead ends: 308 [2021-05-03 14:05:09,932 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 389.9ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:05:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-03 14:05:09,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 243. [2021-05-03 14:05:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.9669421487603307) internal successors, (718), 242 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:09,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 718 transitions. [2021-05-03 14:05:09,936 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 718 transitions. Word has length 16 [2021-05-03 14:05:09,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:09,936 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 718 transitions. [2021-05-03 14:05:09,936 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) [2021-05-03 14:05:09,936 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 718 transitions. [2021-05-03 14:05:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:09,937 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:09,937 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:10,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-05-03 14:05:10,149 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:10,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:10,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1667032441, now seen corresponding path program 67 times [2021-05-03 14:05:10,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:10,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8241684] [2021-05-03 14:05:10,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:10,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8241684] [2021-05-03 14:05:10,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327820185] [2021-05-03 14:05:10,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:10,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:10,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:10,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:10,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:05:10,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:05:10,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:10,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:10,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:10,504 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:05:10,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:05:10,505 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:05:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:10,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:10,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:10,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391332758] [2021-05-03 14:05:10,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:10,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:10,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:10,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:10,531 INFO L87 Difference]: Start difference. First operand 243 states and 718 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:10,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:10,984 INFO L93 Difference]: Finished difference Result 325 states and 881 transitions. [2021-05-03 14:05:10,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:05:10,985 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:10,986 INFO L225 Difference]: With dead ends: 325 [2021-05-03 14:05:10,986 INFO L226 Difference]: Without dead ends: 315 [2021-05-03 14:05:10,986 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 396.7ms TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:05:10,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-05-03 14:05:10,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 255. [2021-05-03 14:05:10,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.9763779527559056) internal successors, (756), 254 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 756 transitions. [2021-05-03 14:05:10,991 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 756 transitions. Word has length 16 [2021-05-03 14:05:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:10,991 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 756 transitions. [2021-05-03 14:05:10,991 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) [2021-05-03 14:05:10,991 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 756 transitions. [2021-05-03 14:05:10,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:10,992 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:10,992 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:11,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:11,206 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:11,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:11,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1138529859, now seen corresponding path program 68 times [2021-05-03 14:05:11,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:11,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90186939] [2021-05-03 14:05:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:11,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90186939] [2021-05-03 14:05:11,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110962375] [2021-05-03 14:05:11,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:05:11,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:11,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:11,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:11,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:11,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:11,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:05:11,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:05:11,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:11,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:11,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:11,596 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:05:11,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:05:11,597 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:05:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:11,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:11,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:11,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158115939] [2021-05-03 14:05:11,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:11,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:11,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:11,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:11,628 INFO L87 Difference]: Start difference. First operand 255 states and 756 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:12,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:12,132 INFO L93 Difference]: Finished difference Result 360 states and 966 transitions. [2021-05-03 14:05:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:05:12,132 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:12,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:12,134 INFO L225 Difference]: With dead ends: 360 [2021-05-03 14:05:12,134 INFO L226 Difference]: Without dead ends: 331 [2021-05-03 14:05:12,134 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 469.5ms TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 14:05:12,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-03 14:05:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 249. [2021-05-03 14:05:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.967741935483871) internal successors, (736), 248 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:12,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 736 transitions. [2021-05-03 14:05:12,138 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 736 transitions. Word has length 16 [2021-05-03 14:05:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:12,138 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 736 transitions. [2021-05-03 14:05:12,138 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) [2021-05-03 14:05:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 736 transitions. [2021-05-03 14:05:12,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:12,139 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:12,139 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:12,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable617 [2021-05-03 14:05:12,360 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:12,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:12,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2083352057, now seen corresponding path program 69 times [2021-05-03 14:05:12,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:12,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965480232] [2021-05-03 14:05:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:12,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965480232] [2021-05-03 14:05:12,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800951331] [2021-05-03 14:05:12,445 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 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 [2021-05-03 14:05:12,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:05:12,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:12,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:12,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:12,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:12,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:05:12,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:05:12,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:12,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:12,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:12,747 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-05-03 14:05:12,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:05:12,748 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:05:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:12,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:12,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:12,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198017176] [2021-05-03 14:05:12,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:12,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:12,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:12,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:12,774 INFO L87 Difference]: Start difference. First operand 249 states and 736 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:13,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:13,116 INFO L93 Difference]: Finished difference Result 305 states and 859 transitions. [2021-05-03 14:05:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:05:13,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:13,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:13,118 INFO L225 Difference]: With dead ends: 305 [2021-05-03 14:05:13,118 INFO L226 Difference]: Without dead ends: 300 [2021-05-03 14:05:13,118 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:05:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-03 14:05:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 250. [2021-05-03 14:05:13,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.967871485943775) internal successors, (739), 249 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:13,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 739 transitions. [2021-05-03 14:05:13,122 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 739 transitions. Word has length 16 [2021-05-03 14:05:13,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:13,122 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 739 transitions. [2021-05-03 14:05:13,122 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) [2021-05-03 14:05:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 739 transitions. [2021-05-03 14:05:13,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:13,123 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:13,123 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:13,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable654,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:13,324 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:13,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:13,324 INFO L82 PathProgramCache]: Analyzing trace with hash 746546959, now seen corresponding path program 70 times [2021-05-03 14:05:13,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:13,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417024496] [2021-05-03 14:05:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:13,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417024496] [2021-05-03 14:05:13,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959139549] [2021-05-03 14:05:13,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:13,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:13,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:13,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:13,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:13,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:13,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:13,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:13,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:13,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:13,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:05:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:13,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:13,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:13,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834748290] [2021-05-03 14:05:13,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:13,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:13,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:13,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:13,627 INFO L87 Difference]: Start difference. First operand 250 states and 739 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:13,867 INFO L93 Difference]: Finished difference Result 285 states and 797 transitions. [2021-05-03 14:05:13,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:05:13,867 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:13,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:13,868 INFO L225 Difference]: With dead ends: 285 [2021-05-03 14:05:13,868 INFO L226 Difference]: Without dead ends: 267 [2021-05-03 14:05:13,868 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 255.9ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:13,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-05-03 14:05:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 250. [2021-05-03 14:05:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.959839357429719) internal successors, (737), 249 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 737 transitions. [2021-05-03 14:05:13,872 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 737 transitions. Word has length 16 [2021-05-03 14:05:13,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:13,872 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 737 transitions. [2021-05-03 14:05:13,872 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) [2021-05-03 14:05:13,873 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 737 transitions. [2021-05-03 14:05:13,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:13,873 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:13,873 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:14,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-05-03 14:05:14,094 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:14,094 INFO L82 PathProgramCache]: Analyzing trace with hash -881350065, now seen corresponding path program 71 times [2021-05-03 14:05:14,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:14,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357282869] [2021-05-03 14:05:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:14,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357282869] [2021-05-03 14:05:14,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287159163] [2021-05-03 14:05:14,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:14,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:05:14,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:14,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:14,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:14,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:14,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:05:14,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:05:14,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:14,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:14,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:14,449 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-05-03 14:05:14,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:05:14,449 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:05:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:14,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:14,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:14,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783875420] [2021-05-03 14:05:14,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:14,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:14,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:14,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:14,485 INFO L87 Difference]: Start difference. First operand 250 states and 737 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:14,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:14,980 INFO L93 Difference]: Finished difference Result 335 states and 919 transitions. [2021-05-03 14:05:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:14,980 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:14,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:14,981 INFO L225 Difference]: With dead ends: 335 [2021-05-03 14:05:14,981 INFO L226 Difference]: Without dead ends: 325 [2021-05-03 14:05:14,981 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 484.5ms TimeCoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 14:05:14,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-03 14:05:14,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 250. [2021-05-03 14:05:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.959839357429719) internal successors, (737), 249 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 737 transitions. [2021-05-03 14:05:14,985 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 737 transitions. Word has length 16 [2021-05-03 14:05:14,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:14,985 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 737 transitions. [2021-05-03 14:05:14,985 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) [2021-05-03 14:05:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 737 transitions. [2021-05-03 14:05:14,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:14,985 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:14,985 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:15,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:15,186 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:15,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:15,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1910944715, now seen corresponding path program 72 times [2021-05-03 14:05:15,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:15,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475437137] [2021-05-03 14:05:15,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:15,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475437137] [2021-05-03 14:05:15,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073582383] [2021-05-03 14:05:15,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:15,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:05:15,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:15,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:15,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:15,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:15,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:15,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:15,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:15,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:15,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:05:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:15,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:15,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:15,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691823627] [2021-05-03 14:05:15,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:15,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:15,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:15,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:15,488 INFO L87 Difference]: Start difference. First operand 250 states and 737 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:15,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:15,696 INFO L93 Difference]: Finished difference Result 306 states and 878 transitions. [2021-05-03 14:05:15,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:15,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:15,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:15,697 INFO L225 Difference]: With dead ends: 306 [2021-05-03 14:05:15,697 INFO L226 Difference]: Without dead ends: 292 [2021-05-03 14:05:15,698 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:05:15,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-05-03 14:05:15,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 277. [2021-05-03 14:05:15,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.0) internal successors, (828), 276 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:15,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 828 transitions. [2021-05-03 14:05:15,702 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 828 transitions. Word has length 16 [2021-05-03 14:05:15,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:15,702 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 828 transitions. [2021-05-03 14:05:15,702 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) [2021-05-03 14:05:15,702 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 828 transitions. [2021-05-03 14:05:15,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:15,703 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:15,703 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:15,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable749,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:15,917 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:15,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:15,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1525148051, now seen corresponding path program 73 times [2021-05-03 14:05:15,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:15,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130767244] [2021-05-03 14:05:15,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:15,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130767244] [2021-05-03 14:05:15,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172562644] [2021-05-03 14:05:15,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:15,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:15,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:16,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:16,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:05:16,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:05:16,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:16,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:16,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:16,272 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:05:16,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:05:16,273 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:05:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:16,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:16,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:16,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247094512] [2021-05-03 14:05:16,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:16,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:16,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:16,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:16,304 INFO L87 Difference]: Start difference. First operand 277 states and 828 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:16,842 INFO L93 Difference]: Finished difference Result 356 states and 998 transitions. [2021-05-03 14:05:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:05:16,843 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:16,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:16,844 INFO L225 Difference]: With dead ends: 356 [2021-05-03 14:05:16,844 INFO L226 Difference]: Without dead ends: 346 [2021-05-03 14:05:16,844 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 428.4ms TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:05:16,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-03 14:05:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 279. [2021-05-03 14:05:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.0071942446043165) internal successors, (836), 278 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 836 transitions. [2021-05-03 14:05:16,848 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 836 transitions. Word has length 16 [2021-05-03 14:05:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:16,848 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 836 transitions. [2021-05-03 14:05:16,848 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) [2021-05-03 14:05:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 836 transitions. [2021-05-03 14:05:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:16,849 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:16,849 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:17,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-05-03 14:05:17,050 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:17,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:17,050 INFO L82 PathProgramCache]: Analyzing trace with hash 185465257, now seen corresponding path program 74 times [2021-05-03 14:05:17,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:17,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698014650] [2021-05-03 14:05:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:17,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698014650] [2021-05-03 14:05:17,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123214145] [2021-05-03 14:05:17,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:17,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:17,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:17,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:17,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:17,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:17,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:05:17,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:05:17,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:17,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:17,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:17,444 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-05-03 14:05:17,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:05:17,445 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:05:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:17,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:17,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:17,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196642810] [2021-05-03 14:05:17,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:17,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:17,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:17,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:17,472 INFO L87 Difference]: Start difference. First operand 279 states and 836 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:17,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:17,931 INFO L93 Difference]: Finished difference Result 370 states and 1018 transitions. [2021-05-03 14:05:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:05:17,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:17,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:17,933 INFO L225 Difference]: With dead ends: 370 [2021-05-03 14:05:17,933 INFO L226 Difference]: Without dead ends: 360 [2021-05-03 14:05:17,933 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:05:17,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-05-03 14:05:17,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 293. [2021-05-03 14:05:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0205479452054793) internal successors, (882), 292 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:17,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 882 transitions. [2021-05-03 14:05:17,938 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 882 transitions. Word has length 16 [2021-05-03 14:05:17,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:17,938 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 882 transitions. [2021-05-03 14:05:17,938 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) [2021-05-03 14:05:17,938 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 882 transitions. [2021-05-03 14:05:17,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:17,939 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:17,939 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:18,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable808,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:18,153 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:18,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:18,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1674870253, now seen corresponding path program 75 times [2021-05-03 14:05:18,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:18,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263659637] [2021-05-03 14:05:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:18,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263659637] [2021-05-03 14:05:18,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991204786] [2021-05-03 14:05:18,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:18,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:05:18,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:18,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:18,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:18,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:18,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:05:18,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:05:18,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:18,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:18,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:18,507 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-05-03 14:05:18,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:05:18,507 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:05:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:18,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:18,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:18,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187976695] [2021-05-03 14:05:18,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:18,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:18,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:18,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:18,533 INFO L87 Difference]: Start difference. First operand 293 states and 882 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:19,009 INFO L93 Difference]: Finished difference Result 377 states and 1037 transitions. [2021-05-03 14:05:19,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:19,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:19,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:19,010 INFO L225 Difference]: With dead ends: 377 [2021-05-03 14:05:19,010 INFO L226 Difference]: Without dead ends: 362 [2021-05-03 14:05:19,011 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 425.0ms TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:05:19,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-03 14:05:19,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 298. [2021-05-03 14:05:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0134680134680134) internal successors, (895), 297 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:19,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 895 transitions. [2021-05-03 14:05:19,015 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 895 transitions. Word has length 16 [2021-05-03 14:05:19,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:19,015 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 895 transitions. [2021-05-03 14:05:19,015 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) [2021-05-03 14:05:19,015 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 895 transitions. [2021-05-03 14:05:19,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:19,016 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:19,016 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:19,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable844,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:19,229 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:19,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:19,229 INFO L82 PathProgramCache]: Analyzing trace with hash 601784873, now seen corresponding path program 76 times [2021-05-03 14:05:19,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:19,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837414602] [2021-05-03 14:05:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:19,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837414602] [2021-05-03 14:05:19,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793866872] [2021-05-03 14:05:19,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:19,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:19,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:19,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:19,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:19,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:19,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:05:19,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:05:19,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:19,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:19,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:19,608 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:05:19,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:05:19,609 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:05:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:19,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:19,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:19,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299357110] [2021-05-03 14:05:19,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:19,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:19,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:19,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:19,635 INFO L87 Difference]: Start difference. First operand 298 states and 895 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:20,203 INFO L93 Difference]: Finished difference Result 410 states and 1106 transitions. [2021-05-03 14:05:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:05:20,204 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:20,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:20,205 INFO L225 Difference]: With dead ends: 410 [2021-05-03 14:05:20,205 INFO L226 Difference]: Without dead ends: 395 [2021-05-03 14:05:20,205 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 558.4ms TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:05:20,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-03 14:05:20,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 297. [2021-05-03 14:05:20,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.027027027027027) internal successors, (896), 296 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:20,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 896 transitions. [2021-05-03 14:05:20,209 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 896 transitions. Word has length 16 [2021-05-03 14:05:20,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:20,209 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 896 transitions. [2021-05-03 14:05:20,209 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) [2021-05-03 14:05:20,209 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 896 transitions. [2021-05-03 14:05:20,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:05:20,210 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:20,210 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:20,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable887 [2021-05-03 14:05:20,410 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:20,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1695876461, now seen corresponding path program 77 times [2021-05-03 14:05:20,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:20,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117251061] [2021-05-03 14:05:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:20,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117251061] [2021-05-03 14:05:20,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880424820] [2021-05-03 14:05:20,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:20,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:05:20,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:20,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 14:05:20,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:20,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:20,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-05-03 14:05:20,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 14:05:20,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:20,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-05-03 14:05:20,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:20,820 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 14:05:20,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:05:20,821 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-05-03 14:05:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:20,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:20,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:20,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251659767] [2021-05-03 14:05:20,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:20,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:20,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:20,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:20,852 INFO L87 Difference]: Start difference. First operand 297 states and 896 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:21,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:21,337 INFO L93 Difference]: Finished difference Result 367 states and 1051 transitions. [2021-05-03 14:05:21,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:05:21,338 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:05:21,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:21,339 INFO L225 Difference]: With dead ends: 367 [2021-05-03 14:05:21,339 INFO L226 Difference]: Without dead ends: 362 [2021-05-03 14:05:21,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 485.1ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:05:21,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-03 14:05:21,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 299. [2021-05-03 14:05:21,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0167785234899327) internal successors, (899), 298 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 899 transitions. [2021-05-03 14:05:21,343 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 899 transitions. Word has length 16 [2021-05-03 14:05:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:21,343 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 899 transitions. [2021-05-03 14:05:21,343 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) [2021-05-03 14:05:21,343 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 899 transitions. [2021-05-03 14:05:21,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:21,344 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:21,344 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:21,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:21,549 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:21,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:21,549 INFO L82 PathProgramCache]: Analyzing trace with hash 576133811, now seen corresponding path program 78 times [2021-05-03 14:05:21,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:21,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786347874] [2021-05-03 14:05:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:21,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786347874] [2021-05-03 14:05:21,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481018247] [2021-05-03 14:05:21,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:21,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:05:21,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:21,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:21,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:21,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:21,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:21,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:21,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:21,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:21,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:21,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:21,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:21,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705701216] [2021-05-03 14:05:21,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:21,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:21,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:21,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:21,940 INFO L87 Difference]: Start difference. First operand 299 states and 899 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:22,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:22,283 INFO L93 Difference]: Finished difference Result 348 states and 996 transitions. [2021-05-03 14:05:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:22,283 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:22,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:22,284 INFO L225 Difference]: With dead ends: 348 [2021-05-03 14:05:22,284 INFO L226 Difference]: Without dead ends: 337 [2021-05-03 14:05:22,284 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:05:22,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-03 14:05:22,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 304. [2021-05-03 14:05:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0) internal successors, (909), 303 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:22,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 909 transitions. [2021-05-03 14:05:22,288 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 909 transitions. Word has length 17 [2021-05-03 14:05:22,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:22,288 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 909 transitions. [2021-05-03 14:05:22,288 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) [2021-05-03 14:05:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 909 transitions. [2021-05-03 14:05:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:22,289 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:22,289 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:22,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable974 [2021-05-03 14:05:22,489 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:22,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:22,489 INFO L82 PathProgramCache]: Analyzing trace with hash 726231765, now seen corresponding path program 79 times [2021-05-03 14:05:22,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:22,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524507057] [2021-05-03 14:05:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:22,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524507057] [2021-05-03 14:05:22,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323202739] [2021-05-03 14:05:22,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:22,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:22,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:22,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:22,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:22,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:22,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:22,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:22,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:22,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:22,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:22,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:22,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378941] [2021-05-03 14:05:22,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:22,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:22,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:22,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:22,836 INFO L87 Difference]: Start difference. First operand 304 states and 909 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:23,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:23,046 INFO L93 Difference]: Finished difference Result 394 states and 1062 transitions. [2021-05-03 14:05:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:23,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:23,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:23,047 INFO L225 Difference]: With dead ends: 394 [2021-05-03 14:05:23,047 INFO L226 Difference]: Without dead ends: 385 [2021-05-03 14:05:23,048 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 237.5ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:23,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-05-03 14:05:23,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 306. [2021-05-03 14:05:23,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0) internal successors, (915), 305 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:23,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2021-05-03 14:05:23,054 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 17 [2021-05-03 14:05:23,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:23,054 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2021-05-03 14:05:23,055 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) [2021-05-03 14:05:23,055 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2021-05-03 14:05:23,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:23,055 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:23,055 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:23,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1003 [2021-05-03 14:05:23,269 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:23,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:23,269 INFO L82 PathProgramCache]: Analyzing trace with hash -999247693, now seen corresponding path program 80 times [2021-05-03 14:05:23,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:23,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768246777] [2021-05-03 14:05:23,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:23,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768246777] [2021-05-03 14:05:23,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370766266] [2021-05-03 14:05:23,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:23,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:23,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:23,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:23,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:23,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:23,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:23,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:23,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:23,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:23,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:23,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:23,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:23,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375859237] [2021-05-03 14:05:23,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:23,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:23,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:23,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:23,648 INFO L87 Difference]: Start difference. First operand 306 states and 915 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:24,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:24,026 INFO L93 Difference]: Finished difference Result 393 states and 1076 transitions. [2021-05-03 14:05:24,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:24,027 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:24,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:24,028 INFO L225 Difference]: With dead ends: 393 [2021-05-03 14:05:24,028 INFO L226 Difference]: Without dead ends: 388 [2021-05-03 14:05:24,028 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:24,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-05-03 14:05:24,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 306. [2021-05-03 14:05:24,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0) internal successors, (915), 305 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2021-05-03 14:05:24,032 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 17 [2021-05-03 14:05:24,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:24,032 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2021-05-03 14:05:24,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:24,032 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2021-05-03 14:05:24,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:24,033 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:24,034 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:24,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1026 [2021-05-03 14:05:24,234 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:24,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:24,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1659695474, now seen corresponding path program 81 times [2021-05-03 14:05:24,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:24,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947105174] [2021-05-03 14:05:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:24,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947105174] [2021-05-03 14:05:24,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267839632] [2021-05-03 14:05:24,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:24,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:05:24,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:24,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:05:24,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:24,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:24,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:05:24,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575282] [2021-05-03 14:05:24,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:05:24,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:24,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:05:24,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:05:24,326 INFO L87 Difference]: Start difference. First operand 306 states and 915 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:24,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:24,373 INFO L93 Difference]: Finished difference Result 469 states and 1200 transitions. [2021-05-03 14:05:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:05:24,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:24,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:24,375 INFO L225 Difference]: With dead ends: 469 [2021-05-03 14:05:24,375 INFO L226 Difference]: Without dead ends: 469 [2021-05-03 14:05:24,375 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-05-03 14:05:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 312. [2021-05-03 14:05:24,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0160771704180065) internal successors, (938), 311 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:24,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 938 transitions. [2021-05-03 14:05:24,379 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 938 transitions. Word has length 17 [2021-05-03 14:05:24,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:24,379 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 938 transitions. [2021-05-03 14:05:24,379 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) [2021-05-03 14:05:24,379 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 938 transitions. [2021-05-03 14:05:24,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:24,380 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:24,380 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:24,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-05-03 14:05:24,580 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:24,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:24,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1013855483, now seen corresponding path program 82 times [2021-05-03 14:05:24,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:24,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900404244] [2021-05-03 14:05:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:24,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900404244] [2021-05-03 14:05:24,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635470162] [2021-05-03 14:05:24,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:24,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:24,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:24,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:24,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:24,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:24,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:24,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:24,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:24,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:24,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:24,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:24,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:24,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839199325] [2021-05-03 14:05:24,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:24,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:24,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:24,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:24,885 INFO L87 Difference]: Start difference. First operand 312 states and 938 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:25,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:25,137 INFO L93 Difference]: Finished difference Result 389 states and 1080 transitions. [2021-05-03 14:05:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:25,138 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:25,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:25,139 INFO L225 Difference]: With dead ends: 389 [2021-05-03 14:05:25,139 INFO L226 Difference]: Without dead ends: 384 [2021-05-03 14:05:25,139 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:25,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-05-03 14:05:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 314. [2021-05-03 14:05:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.022364217252396) internal successors, (946), 313 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 946 transitions. [2021-05-03 14:05:25,143 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 946 transitions. Word has length 17 [2021-05-03 14:05:25,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:25,143 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 946 transitions. [2021-05-03 14:05:25,143 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) [2021-05-03 14:05:25,143 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 946 transitions. [2021-05-03 14:05:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:25,144 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:25,144 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:25,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-05-03 14:05:25,348 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:25,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:25,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1555632355, now seen corresponding path program 83 times [2021-05-03 14:05:25,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:25,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208672] [2021-05-03 14:05:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:25,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208672] [2021-05-03 14:05:25,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508212538] [2021-05-03 14:05:25,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:25,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:05:25,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:25,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:25,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:25,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:25,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:25,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:25,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:25,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:25,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:25,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:25,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:25,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467965208] [2021-05-03 14:05:25,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:25,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:25,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:25,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:25,691 INFO L87 Difference]: Start difference. First operand 314 states and 946 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:25,966 INFO L93 Difference]: Finished difference Result 398 states and 1096 transitions. [2021-05-03 14:05:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:05:25,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:25,968 INFO L225 Difference]: With dead ends: 398 [2021-05-03 14:05:25,968 INFO L226 Difference]: Without dead ends: 389 [2021-05-03 14:05:25,969 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:25,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-05-03 14:05:25,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 316. [2021-05-03 14:05:25,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.015873015873016) internal successors, (950), 315 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:25,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 950 transitions. [2021-05-03 14:05:25,974 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 950 transitions. Word has length 17 [2021-05-03 14:05:25,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:25,974 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 950 transitions. [2021-05-03 14:05:25,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:25,974 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 950 transitions. [2021-05-03 14:05:25,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:25,975 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:25,975 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:26,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1084,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:26,185 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:26,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:26,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1249929945, now seen corresponding path program 84 times [2021-05-03 14:05:26,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:26,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048888231] [2021-05-03 14:05:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:26,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048888231] [2021-05-03 14:05:26,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866016385] [2021-05-03 14:05:26,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:26,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:05:26,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:26,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:26,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:26,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:26,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:26,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:26,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:26,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:26,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:26,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:26,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:26,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584768261] [2021-05-03 14:05:26,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:26,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:26,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:26,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:26,522 INFO L87 Difference]: Start difference. First operand 316 states and 950 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:26,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:26,711 INFO L93 Difference]: Finished difference Result 377 states and 1066 transitions. [2021-05-03 14:05:26,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:05:26,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:26,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:26,713 INFO L225 Difference]: With dead ends: 377 [2021-05-03 14:05:26,713 INFO L226 Difference]: Without dead ends: 372 [2021-05-03 14:05:26,713 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:05:26,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-05-03 14:05:26,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 316. [2021-05-03 14:05:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.015873015873016) internal successors, (950), 315 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:26,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 950 transitions. [2021-05-03 14:05:26,720 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 950 transitions. Word has length 17 [2021-05-03 14:05:26,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:26,720 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 950 transitions. [2021-05-03 14:05:26,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:26,720 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 950 transitions. [2021-05-03 14:05:26,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:26,721 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:26,721 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:26,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1117,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:26,933 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:26,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2141251576, now seen corresponding path program 85 times [2021-05-03 14:05:26,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:26,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870958015] [2021-05-03 14:05:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:26,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870958015] [2021-05-03 14:05:26,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228769640] [2021-05-03 14:05:26,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:26,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:05:26,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:27,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:27,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:05:27,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206927123] [2021-05-03 14:05:27,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:05:27,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:27,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:05:27,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:27,016 INFO L87 Difference]: Start difference. First operand 316 states and 950 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:27,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:27,085 INFO L93 Difference]: Finished difference Result 509 states and 1289 transitions. [2021-05-03 14:05:27,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:05:27,086 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:27,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:27,087 INFO L225 Difference]: With dead ends: 509 [2021-05-03 14:05:27,087 INFO L226 Difference]: Without dead ends: 509 [2021-05-03 14:05:27,088 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:27,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-05-03 14:05:27,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 312. [2021-05-03 14:05:27,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.012861736334405) internal successors, (937), 311 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:27,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 937 transitions. [2021-05-03 14:05:27,094 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 937 transitions. Word has length 17 [2021-05-03 14:05:27,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:27,094 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 937 transitions. [2021-05-03 14:05:27,094 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) [2021-05-03 14:05:27,094 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 937 transitions. [2021-05-03 14:05:27,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:27,095 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:27,095 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:27,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1148,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:27,296 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:27,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1196751859, now seen corresponding path program 86 times [2021-05-03 14:05:27,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:27,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800714693] [2021-05-03 14:05:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:27,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800714693] [2021-05-03 14:05:27,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663908851] [2021-05-03 14:05:27,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:05:27,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:27,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:27,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:27,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:27,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:27,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:27,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:27,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:27,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:27,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:27,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:27,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-05-03 14:05:27,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843378537] [2021-05-03 14:05:27,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:05:27,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:27,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:05:27,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:05:27,596 INFO L87 Difference]: Start difference. First operand 312 states and 937 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:27,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:27,797 INFO L93 Difference]: Finished difference Result 345 states and 992 transitions. [2021-05-03 14:05:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:05:27,797 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 [2021-05-03 14:05:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:27,799 INFO L225 Difference]: With dead ends: 345 [2021-05-03 14:05:27,799 INFO L226 Difference]: Without dead ends: 321 [2021-05-03 14:05:27,799 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-03 14:05:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 313. [2021-05-03 14:05:27,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.0096153846153846) internal successors, (939), 312 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 939 transitions. [2021-05-03 14:05:27,804 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 939 transitions. Word has length 17 [2021-05-03 14:05:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:27,804 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 939 transitions. [2021-05-03 14:05:27,804 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) [2021-05-03 14:05:27,804 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 939 transitions. [2021-05-03 14:05:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:27,805 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:27,805 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:28,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1149 [2021-05-03 14:05:28,009 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:28,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:28,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1148286481, now seen corresponding path program 87 times [2021-05-03 14:05:28,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:28,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419633675] [2021-05-03 14:05:28,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:28,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419633675] [2021-05-03 14:05:28,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323706554] [2021-05-03 14:05:28,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:28,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:05:28,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:28,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:28,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:28,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:28,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:28,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:28,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:28,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:28,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:28,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:28,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:28,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276905298] [2021-05-03 14:05:28,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:28,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:28,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:28,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:28,316 INFO L87 Difference]: Start difference. First operand 313 states and 939 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:28,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:28,582 INFO L93 Difference]: Finished difference Result 386 states and 1054 transitions. [2021-05-03 14:05:28,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:28,582 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:28,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:28,583 INFO L225 Difference]: With dead ends: 386 [2021-05-03 14:05:28,583 INFO L226 Difference]: Without dead ends: 363 [2021-05-03 14:05:28,584 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 247.2ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:28,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-03 14:05:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 313. [2021-05-03 14:05:28,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.996794871794872) internal successors, (935), 312 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:28,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 935 transitions. [2021-05-03 14:05:28,588 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 935 transitions. Word has length 17 [2021-05-03 14:05:28,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:28,588 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 935 transitions. [2021-05-03 14:05:28,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:28,588 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 935 transitions. [2021-05-03 14:05:28,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:28,589 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:28,589 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:28,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-05-03 14:05:28,789 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:28,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:28,789 INFO L82 PathProgramCache]: Analyzing trace with hash 878014677, now seen corresponding path program 88 times [2021-05-03 14:05:28,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:28,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662442037] [2021-05-03 14:05:28,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:28,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662442037] [2021-05-03 14:05:28,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362513265] [2021-05-03 14:05:28,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:28,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:28,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:28,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:28,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:29,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:29,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:29,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:29,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:29,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:29,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:29,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:29,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:29,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850679060] [2021-05-03 14:05:29,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:29,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:29,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:29,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:29,088 INFO L87 Difference]: Start difference. First operand 313 states and 935 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:29,318 INFO L93 Difference]: Finished difference Result 367 states and 1032 transitions. [2021-05-03 14:05:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:29,318 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:29,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:29,319 INFO L225 Difference]: With dead ends: 367 [2021-05-03 14:05:29,319 INFO L226 Difference]: Without dead ends: 358 [2021-05-03 14:05:29,319 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-05-03 14:05:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 312. [2021-05-03 14:05:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.987138263665595) internal successors, (929), 311 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 929 transitions. [2021-05-03 14:05:29,323 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 929 transitions. Word has length 17 [2021-05-03 14:05:29,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:29,323 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 929 transitions. [2021-05-03 14:05:29,323 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) [2021-05-03 14:05:29,323 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 929 transitions. [2021-05-03 14:05:29,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:29,324 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:29,324 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:29,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1197,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:29,535 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:29,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:29,536 INFO L82 PathProgramCache]: Analyzing trace with hash -847464781, now seen corresponding path program 89 times [2021-05-03 14:05:29,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:29,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998607621] [2021-05-03 14:05:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:29,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998607621] [2021-05-03 14:05:29,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265030257] [2021-05-03 14:05:29,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:29,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:05:29,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:29,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:29,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:29,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:29,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:29,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:29,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:29,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:29,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:29,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:29,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:29,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955437972] [2021-05-03 14:05:29,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:29,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:29,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:29,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:29,852 INFO L87 Difference]: Start difference. First operand 312 states and 929 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:30,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:30,178 INFO L93 Difference]: Finished difference Result 358 states and 1007 transitions. [2021-05-03 14:05:30,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:30,178 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:30,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:30,179 INFO L225 Difference]: With dead ends: 358 [2021-05-03 14:05:30,179 INFO L226 Difference]: Without dead ends: 353 [2021-05-03 14:05:30,179 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 224.9ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:30,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-03 14:05:30,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 310. [2021-05-03 14:05:30,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9967637540453076) internal successors, (926), 309 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:30,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 926 transitions. [2021-05-03 14:05:30,184 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 926 transitions. Word has length 17 [2021-05-03 14:05:30,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:30,184 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 926 transitions. [2021-05-03 14:05:30,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 926 transitions. [2021-05-03 14:05:30,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:30,185 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:30,185 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:30,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1220 [2021-05-03 14:05:30,401 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:30,401 INFO L82 PathProgramCache]: Analyzing trace with hash 641940215, now seen corresponding path program 90 times [2021-05-03 14:05:30,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:30,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257740073] [2021-05-03 14:05:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:30,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257740073] [2021-05-03 14:05:30,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979487188] [2021-05-03 14:05:30,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:05:30,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:05:30,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:30,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:30,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:30,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:30,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:30,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:30,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:30,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:30,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:30,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:30,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:30,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465138544] [2021-05-03 14:05:30,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:30,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:30,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:30,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:30,737 INFO L87 Difference]: Start difference. First operand 310 states and 926 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:31,080 INFO L93 Difference]: Finished difference Result 390 states and 1052 transitions. [2021-05-03 14:05:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:05:31,081 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:31,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:31,082 INFO L225 Difference]: With dead ends: 390 [2021-05-03 14:05:31,082 INFO L226 Difference]: Without dead ends: 367 [2021-05-03 14:05:31,082 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:31,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-03 14:05:31,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 308. [2021-05-03 14:05:31,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.96742671009772) internal successors, (911), 307 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 911 transitions. [2021-05-03 14:05:31,085 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 911 transitions. Word has length 17 [2021-05-03 14:05:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:31,085 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 911 transitions. [2021-05-03 14:05:31,085 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) [2021-05-03 14:05:31,085 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 911 transitions. [2021-05-03 14:05:31,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:31,086 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:31,086 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:31,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1247,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:31,286 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:31,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:31,287 INFO L82 PathProgramCache]: Analyzing trace with hash -249381416, now seen corresponding path program 91 times [2021-05-03 14:05:31,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:31,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657095346] [2021-05-03 14:05:31,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:31,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657095346] [2021-05-03 14:05:31,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333216927] [2021-05-03 14:05:31,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:31,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:05:31,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:31,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:31,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:05:31,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898342885] [2021-05-03 14:05:31,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:05:31,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:31,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:05:31,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:31,413 INFO L87 Difference]: Start difference. First operand 308 states and 911 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:31,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:31,476 INFO L93 Difference]: Finished difference Result 461 states and 1184 transitions. [2021-05-03 14:05:31,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:05:31,477 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:31,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:31,477 INFO L225 Difference]: With dead ends: 461 [2021-05-03 14:05:31,477 INFO L226 Difference]: Without dead ends: 461 [2021-05-03 14:05:31,477 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:31,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-05-03 14:05:31,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 321. [2021-05-03 14:05:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.98125) internal successors, (954), 320 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:31,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 954 transitions. [2021-05-03 14:05:31,485 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 954 transitions. Word has length 17 [2021-05-03 14:05:31,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:31,485 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 954 transitions. [2021-05-03 14:05:31,485 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) [2021-05-03 14:05:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 954 transitions. [2021-05-03 14:05:31,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:31,486 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:31,486 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:31,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:31,686 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:31,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:31,687 INFO L82 PathProgramCache]: Analyzing trace with hash -431145165, now seen corresponding path program 92 times [2021-05-03 14:05:31,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:31,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660536288] [2021-05-03 14:05:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:31,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660536288] [2021-05-03 14:05:31,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551713069] [2021-05-03 14:05:31,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:31,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:31,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:31,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:31,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:31,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:31,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:32,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:32,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:32,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:32,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:32,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:32,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:32,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741977572] [2021-05-03 14:05:32,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:32,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:32,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:32,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:32,029 INFO L87 Difference]: Start difference. First operand 321 states and 954 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:32,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:32,339 INFO L93 Difference]: Finished difference Result 404 states and 1118 transitions. [2021-05-03 14:05:32,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:05:32,340 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:32,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:32,341 INFO L225 Difference]: With dead ends: 404 [2021-05-03 14:05:32,341 INFO L226 Difference]: Without dead ends: 399 [2021-05-03 14:05:32,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:32,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-05-03 14:05:32,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 321. [2021-05-03 14:05:32,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.98125) internal successors, (954), 320 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:32,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 954 transitions. [2021-05-03 14:05:32,346 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 954 transitions. Word has length 17 [2021-05-03 14:05:32,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:32,347 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 954 transitions. [2021-05-03 14:05:32,347 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) [2021-05-03 14:05:32,347 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 954 transitions. [2021-05-03 14:05:32,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:32,347 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:32,347 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:32,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1272 [2021-05-03 14:05:32,548 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:32,548 INFO L82 PathProgramCache]: Analyzing trace with hash 288474162, now seen corresponding path program 93 times [2021-05-03 14:05:32,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:32,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759000733] [2021-05-03 14:05:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:32,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759000733] [2021-05-03 14:05:32,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358859860] [2021-05-03 14:05:32,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:32,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:05:32,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:32,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:05:32,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:32,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:32,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:05:32,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762787567] [2021-05-03 14:05:32,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:05:32,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:32,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:05:32,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:32,634 INFO L87 Difference]: Start difference. First operand 321 states and 954 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:32,725 INFO L93 Difference]: Finished difference Result 535 states and 1451 transitions. [2021-05-03 14:05:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:05:32,725 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:32,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:32,726 INFO L225 Difference]: With dead ends: 535 [2021-05-03 14:05:32,726 INFO L226 Difference]: Without dead ends: 535 [2021-05-03 14:05:32,726 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-05-03 14:05:32,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 405. [2021-05-03 14:05:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.027227722772277) internal successors, (1223), 404 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:32,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1223 transitions. [2021-05-03 14:05:32,733 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1223 transitions. Word has length 17 [2021-05-03 14:05:32,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:32,733 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 1223 transitions. [2021-05-03 14:05:32,733 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) [2021-05-03 14:05:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1223 transitions. [2021-05-03 14:05:32,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:32,734 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:32,734 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:32,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1294,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:32,951 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:32,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:32,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1767950263, now seen corresponding path program 94 times [2021-05-03 14:05:32,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:32,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956157359] [2021-05-03 14:05:32,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:33,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956157359] [2021-05-03 14:05:33,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921002054] [2021-05-03 14:05:33,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:33,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:33,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:33,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:33,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:33,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:33,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:33,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:33,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:33,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:33,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:33,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:33,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:33,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358472536] [2021-05-03 14:05:33,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:33,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:33,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:33,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:33,266 INFO L87 Difference]: Start difference. First operand 405 states and 1223 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:33,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:33,484 INFO L93 Difference]: Finished difference Result 449 states and 1310 transitions. [2021-05-03 14:05:33,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:05:33,485 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:33,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:33,485 INFO L225 Difference]: With dead ends: 449 [2021-05-03 14:05:33,486 INFO L226 Difference]: Without dead ends: 439 [2021-05-03 14:05:33,486 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:33,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-05-03 14:05:33,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 408. [2021-05-03 14:05:33,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.022113022113022) internal successors, (1230), 407 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:33,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1230 transitions. [2021-05-03 14:05:33,492 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1230 transitions. Word has length 17 [2021-05-03 14:05:33,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:33,492 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1230 transitions. [2021-05-03 14:05:33,492 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) [2021-05-03 14:05:33,492 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1230 transitions. [2021-05-03 14:05:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:33,493 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:33,493 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:33,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:33,709 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:33,709 INFO L82 PathProgramCache]: Analyzing trace with hash 899120009, now seen corresponding path program 95 times [2021-05-03 14:05:33,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:33,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125018680] [2021-05-03 14:05:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:33,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125018680] [2021-05-03 14:05:33,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411652428] [2021-05-03 14:05:33,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:33,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:05:33,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:33,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:33,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:33,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:33,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:34,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:34,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:34,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:34,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:34,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:34,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:34,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655342395] [2021-05-03 14:05:34,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:34,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:34,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:34,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:34,062 INFO L87 Difference]: Start difference. First operand 408 states and 1230 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:34,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:34,285 INFO L93 Difference]: Finished difference Result 472 states and 1325 transitions. [2021-05-03 14:05:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:05:34,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:34,286 INFO L225 Difference]: With dead ends: 472 [2021-05-03 14:05:34,286 INFO L226 Difference]: Without dead ends: 459 [2021-05-03 14:05:34,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:34,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-05-03 14:05:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 408. [2021-05-03 14:05:34,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-05-03 14:05:34,291 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-05-03 14:05:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:34,291 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-05-03 14:05:34,291 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) [2021-05-03 14:05:34,291 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-05-03 14:05:34,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:34,291 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:34,292 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:34,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1323 [2021-05-03 14:05:34,493 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:34,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:34,493 INFO L82 PathProgramCache]: Analyzing trace with hash -603552507, now seen corresponding path program 96 times [2021-05-03 14:05:34,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:34,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277624982] [2021-05-03 14:05:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:34,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277624982] [2021-05-03 14:05:34,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546405067] [2021-05-03 14:05:34,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:05:34,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:05:34,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:34,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:34,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:34,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:34,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:34,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:34,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:34,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:34,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:34,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:34,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:34,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456741060] [2021-05-03 14:05:34,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:34,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:34,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:34,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:34,868 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:35,184 INFO L93 Difference]: Finished difference Result 440 states and 1285 transitions. [2021-05-03 14:05:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:35,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:35,186 INFO L225 Difference]: With dead ends: 440 [2021-05-03 14:05:35,186 INFO L226 Difference]: Without dead ends: 435 [2021-05-03 14:05:35,186 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 265.2ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:35,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-05-03 14:05:35,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 408. [2021-05-03 14:05:35,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:35,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-05-03 14:05:35,193 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-05-03 14:05:35,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:35,193 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-05-03 14:05:35,193 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) [2021-05-03 14:05:35,193 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-05-03 14:05:35,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:35,194 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:35,194 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:35,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1355 [2021-05-03 14:05:35,409 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:35,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:35,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1965935331, now seen corresponding path program 97 times [2021-05-03 14:05:35,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:35,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701948576] [2021-05-03 14:05:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:35,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701948576] [2021-05-03 14:05:35,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779626572] [2021-05-03 14:05:35,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:35,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:35,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:35,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:35,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:35,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:35,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:35,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:35,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:35,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:35,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:35,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203221893] [2021-05-03 14:05:35,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:35,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:35,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:35,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:35,764 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:36,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:36,010 INFO L93 Difference]: Finished difference Result 447 states and 1289 transitions. [2021-05-03 14:05:36,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:36,011 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:36,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:36,012 INFO L225 Difference]: With dead ends: 447 [2021-05-03 14:05:36,012 INFO L226 Difference]: Without dead ends: 442 [2021-05-03 14:05:36,012 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:36,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-05-03 14:05:36,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 408. [2021-05-03 14:05:36,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:36,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-05-03 14:05:36,018 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-05-03 14:05:36,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:36,018 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-05-03 14:05:36,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:36,018 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-05-03 14:05:36,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:36,019 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:36,019 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:36,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1384,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:36,240 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:36,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:36,240 INFO L82 PathProgramCache]: Analyzing trace with hash -839626969, now seen corresponding path program 98 times [2021-05-03 14:05:36,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:36,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428587115] [2021-05-03 14:05:36,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:36,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428587115] [2021-05-03 14:05:36,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205636254] [2021-05-03 14:05:36,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:36,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:36,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:36,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:36,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:36,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:36,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:36,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:36,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:36,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:36,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:36,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:36,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:36,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868852042] [2021-05-03 14:05:36,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:36,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:36,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:36,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:36,584 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:36,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:36,785 INFO L93 Difference]: Finished difference Result 462 states and 1322 transitions. [2021-05-03 14:05:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:05:36,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:36,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:36,786 INFO L225 Difference]: With dead ends: 462 [2021-05-03 14:05:36,786 INFO L226 Difference]: Without dead ends: 457 [2021-05-03 14:05:36,786 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:05:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-05-03 14:05:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 408. [2021-05-03 14:05:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:36,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-05-03 14:05:36,790 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-05-03 14:05:36,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:36,791 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-05-03 14:05:36,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:36,791 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-05-03 14:05:36,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:36,791 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:36,791 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:36,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1410 [2021-05-03 14:05:36,992 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:36,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1912712349, now seen corresponding path program 99 times [2021-05-03 14:05:36,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:36,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62083744] [2021-05-03 14:05:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:37,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62083744] [2021-05-03 14:05:37,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159093857] [2021-05-03 14:05:37,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:37,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:05:37,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:37,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:37,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:37,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:37,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:37,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:37,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:37,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:37,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:37,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:37,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688844260] [2021-05-03 14:05:37,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:37,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:37,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:37,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:37,309 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:37,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:37,545 INFO L93 Difference]: Finished difference Result 490 states and 1379 transitions. [2021-05-03 14:05:37,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:37,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:37,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:37,546 INFO L225 Difference]: With dead ends: 490 [2021-05-03 14:05:37,546 INFO L226 Difference]: Without dead ends: 477 [2021-05-03 14:05:37,546 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-05-03 14:05:37,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 408. [2021-05-03 14:05:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0) internal successors, (1221), 407 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:37,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1221 transitions. [2021-05-03 14:05:37,550 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1221 transitions. Word has length 17 [2021-05-03 14:05:37,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:37,551 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1221 transitions. [2021-05-03 14:05:37,551 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) [2021-05-03 14:05:37,551 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1221 transitions. [2021-05-03 14:05:37,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:37,551 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:37,551 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:37,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1443 [2021-05-03 14:05:37,760 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:37,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1193093022, now seen corresponding path program 100 times [2021-05-03 14:05:37,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:37,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194307871] [2021-05-03 14:05:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:37,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194307871] [2021-05-03 14:05:37,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979703679] [2021-05-03 14:05:37,797 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 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 [2021-05-03 14:05:37,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:37,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:37,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:05:37,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:37,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:37,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:05:37,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505036823] [2021-05-03 14:05:37,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:05:37,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:37,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:05:37,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:05:37,851 INFO L87 Difference]: Start difference. First operand 408 states and 1221 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:37,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:37,938 INFO L93 Difference]: Finished difference Result 549 states and 1446 transitions. [2021-05-03 14:05:37,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:05:37,939 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:37,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:37,939 INFO L225 Difference]: With dead ends: 549 [2021-05-03 14:05:37,939 INFO L226 Difference]: Without dead ends: 549 [2021-05-03 14:05:37,940 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:37,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-05-03 14:05:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 317. [2021-05-03 14:05:37,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9272151898734178) internal successors, (925), 316 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:37,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 925 transitions. [2021-05-03 14:05:37,943 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 925 transitions. Word has length 17 [2021-05-03 14:05:37,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:37,943 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 925 transitions. [2021-05-03 14:05:37,944 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) [2021-05-03 14:05:37,944 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 925 transitions. [2021-05-03 14:05:37,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:37,944 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:37,944 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:38,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1467 [2021-05-03 14:05:38,145 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:38,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:38,145 INFO L82 PathProgramCache]: Analyzing trace with hash -818620761, now seen corresponding path program 101 times [2021-05-03 14:05:38,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:38,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907245376] [2021-05-03 14:05:38,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:38,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907245376] [2021-05-03 14:05:38,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301709880] [2021-05-03 14:05:38,220 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:38,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:05:38,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:38,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:38,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:38,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:38,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:38,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:38,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:38,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:38,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:38,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:38,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:38,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:38,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210425151] [2021-05-03 14:05:38,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:38,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:38,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:38,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:38,538 INFO L87 Difference]: Start difference. First operand 317 states and 925 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:38,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:38,852 INFO L93 Difference]: Finished difference Result 398 states and 1075 transitions. [2021-05-03 14:05:38,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:05:38,853 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:38,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:38,854 INFO L225 Difference]: With dead ends: 398 [2021-05-03 14:05:38,854 INFO L226 Difference]: Without dead ends: 393 [2021-05-03 14:05:38,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:38,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-03 14:05:38,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 317. [2021-05-03 14:05:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9272151898734178) internal successors, (925), 316 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 925 transitions. [2021-05-03 14:05:38,857 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 925 transitions. Word has length 17 [2021-05-03 14:05:38,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:38,857 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 925 transitions. [2021-05-03 14:05:38,857 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) [2021-05-03 14:05:38,857 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 925 transitions. [2021-05-03 14:05:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:38,858 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:38,858 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:39,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1468 [2021-05-03 14:05:39,058 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:39,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:39,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1699439288, now seen corresponding path program 102 times [2021-05-03 14:05:39,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:39,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319631653] [2021-05-03 14:05:39,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:39,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319631653] [2021-05-03 14:05:39,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83004229] [2021-05-03 14:05:39,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:39,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:05:39,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:39,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:05:39,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:39,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:39,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:05:39,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137521680] [2021-05-03 14:05:39,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:05:39,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:39,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:05:39,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:05:39,154 INFO L87 Difference]: Start difference. First operand 317 states and 925 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:39,276 INFO L93 Difference]: Finished difference Result 478 states and 1278 transitions. [2021-05-03 14:05:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:39,276 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:39,277 INFO L225 Difference]: With dead ends: 478 [2021-05-03 14:05:39,277 INFO L226 Difference]: Without dead ends: 478 [2021-05-03 14:05:39,277 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:05:39,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-05-03 14:05:39,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 361. [2021-05-03 14:05:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.9611111111111112) internal successors, (1066), 360 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1066 transitions. [2021-05-03 14:05:39,281 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1066 transitions. Word has length 17 [2021-05-03 14:05:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:39,281 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 1066 transitions. [2021-05-03 14:05:39,281 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) [2021-05-03 14:05:39,281 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1066 transitions. [2021-05-03 14:05:39,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:39,281 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:39,281 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:39,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1503,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:39,482 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:39,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:39,482 INFO L82 PathProgramCache]: Analyzing trace with hash 815564467, now seen corresponding path program 103 times [2021-05-03 14:05:39,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:39,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299846231] [2021-05-03 14:05:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:39,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299846231] [2021-05-03 14:05:39,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985775756] [2021-05-03 14:05:39,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:39,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:39,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:39,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:39,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:39,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:39,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:39,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:39,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:39,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:39,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:39,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615869873] [2021-05-03 14:05:39,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:39,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:39,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:39,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:39,827 INFO L87 Difference]: Start difference. First operand 361 states and 1066 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:40,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:40,149 INFO L93 Difference]: Finished difference Result 418 states and 1180 transitions. [2021-05-03 14:05:40,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:05:40,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:40,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:40,150 INFO L225 Difference]: With dead ends: 418 [2021-05-03 14:05:40,150 INFO L226 Difference]: Without dead ends: 408 [2021-05-03 14:05:40,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:40,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-03 14:05:40,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 366. [2021-05-03 14:05:40,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.967123287671233) internal successors, (1083), 365 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:40,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1083 transitions. [2021-05-03 14:05:40,155 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1083 transitions. Word has length 17 [2021-05-03 14:05:40,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:40,155 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1083 transitions. [2021-05-03 14:05:40,155 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) [2021-05-03 14:05:40,156 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1083 transitions. [2021-05-03 14:05:40,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:40,156 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:40,156 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:40,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1504,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:40,357 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:40,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:40,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1764893969, now seen corresponding path program 104 times [2021-05-03 14:05:40,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:40,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303811352] [2021-05-03 14:05:40,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:40,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303811352] [2021-05-03 14:05:40,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468971790] [2021-05-03 14:05:40,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:40,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:40,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:40,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:40,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:40,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:40,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:40,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:40,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:40,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:40,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:40,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:40,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:40,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908957489] [2021-05-03 14:05:40,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:40,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:40,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:40,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:40,697 INFO L87 Difference]: Start difference. First operand 366 states and 1083 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:40,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:40,978 INFO L93 Difference]: Finished difference Result 443 states and 1194 transitions. [2021-05-03 14:05:40,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:40,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:40,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:40,980 INFO L225 Difference]: With dead ends: 443 [2021-05-03 14:05:40,980 INFO L226 Difference]: Without dead ends: 428 [2021-05-03 14:05:40,980 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:40,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-05-03 14:05:40,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 366. [2021-05-03 14:05:40,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9616438356164383) internal successors, (1081), 365 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:40,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1081 transitions. [2021-05-03 14:05:40,986 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1081 transitions. Word has length 17 [2021-05-03 14:05:40,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:40,986 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1081 transitions. [2021-05-03 14:05:40,986 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) [2021-05-03 14:05:40,986 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1081 transitions. [2021-05-03 14:05:40,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:40,987 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:40,987 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:41,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1527,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:41,205 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:41,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:41,205 INFO L82 PathProgramCache]: Analyzing trace with hash 712505045, now seen corresponding path program 105 times [2021-05-03 14:05:41,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:41,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086748031] [2021-05-03 14:05:41,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:41,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:41,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086748031] [2021-05-03 14:05:41,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048937719] [2021-05-03 14:05:41,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:41,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:05:41,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:41,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:41,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:41,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:41,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:41,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:41,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:41,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:41,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:41,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:41,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:41,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649091821] [2021-05-03 14:05:41,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:41,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:41,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:41,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:41,532 INFO L87 Difference]: Start difference. First operand 366 states and 1081 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:41,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:41,759 INFO L93 Difference]: Finished difference Result 398 states and 1150 transitions. [2021-05-03 14:05:41,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:05:41,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:41,760 INFO L225 Difference]: With dead ends: 398 [2021-05-03 14:05:41,760 INFO L226 Difference]: Without dead ends: 393 [2021-05-03 14:05:41,760 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:41,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-03 14:05:41,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 366. [2021-05-03 14:05:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9616438356164383) internal successors, (1081), 365 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1081 transitions. [2021-05-03 14:05:41,765 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1081 transitions. Word has length 17 [2021-05-03 14:05:41,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:41,765 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1081 transitions. [2021-05-03 14:05:41,765 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) [2021-05-03 14:05:41,765 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1081 transitions. [2021-05-03 14:05:41,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:41,766 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:41,766 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:41,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1560,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:41,978 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:41,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1012974413, now seen corresponding path program 106 times [2021-05-03 14:05:41,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:41,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423792524] [2021-05-03 14:05:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:42,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423792524] [2021-05-03 14:05:42,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598782530] [2021-05-03 14:05:42,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:42,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:42,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:42,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:42,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:42,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:42,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:42,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:42,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:42,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:42,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:42,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:42,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:42,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238678580] [2021-05-03 14:05:42,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:42,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:42,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:42,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:42,338 INFO L87 Difference]: Start difference. First operand 366 states and 1081 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:42,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:42,702 INFO L93 Difference]: Finished difference Result 409 states and 1153 transitions. [2021-05-03 14:05:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:42,703 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:42,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:42,704 INFO L225 Difference]: With dead ends: 409 [2021-05-03 14:05:42,704 INFO L226 Difference]: Without dead ends: 404 [2021-05-03 14:05:42,704 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 259.6ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-03 14:05:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 366. [2021-05-03 14:05:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9616438356164383) internal successors, (1081), 365 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1081 transitions. [2021-05-03 14:05:42,709 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1081 transitions. Word has length 17 [2021-05-03 14:05:42,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:42,709 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1081 transitions. [2021-05-03 14:05:42,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1081 transitions. [2021-05-03 14:05:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:42,710 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:42,710 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:42,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-05-03 14:05:42,932 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:42,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:42,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1645968754, now seen corresponding path program 107 times [2021-05-03 14:05:42,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:42,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689229850] [2021-05-03 14:05:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:42,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689229850] [2021-05-03 14:05:42,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889870604] [2021-05-03 14:05:42,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:42,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:05:42,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:42,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:05:42,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:43,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:43,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:05:43,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821125204] [2021-05-03 14:05:43,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:05:43,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:43,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:05:43,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:05:43,011 INFO L87 Difference]: Start difference. First operand 366 states and 1081 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:43,067 INFO L93 Difference]: Finished difference Result 517 states and 1369 transitions. [2021-05-03 14:05:43,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:05:43,068 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:43,068 INFO L225 Difference]: With dead ends: 517 [2021-05-03 14:05:43,068 INFO L226 Difference]: Without dead ends: 517 [2021-05-03 14:05:43,069 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:05:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-05-03 14:05:43,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 397. [2021-05-03 14:05:43,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.9823232323232323) internal successors, (1181), 396 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1181 transitions. [2021-05-03 14:05:43,073 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1181 transitions. Word has length 17 [2021-05-03 14:05:43,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:43,073 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 1181 transitions. [2021-05-03 14:05:43,073 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) [2021-05-03 14:05:43,073 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1181 transitions. [2021-05-03 14:05:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:43,074 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:43,074 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:43,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1627 [2021-05-03 14:05:43,274 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:43,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:43,275 INFO L82 PathProgramCache]: Analyzing trace with hash 476430583, now seen corresponding path program 108 times [2021-05-03 14:05:43,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:43,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514192704] [2021-05-03 14:05:43,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:43,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514192704] [2021-05-03 14:05:43,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299684698] [2021-05-03 14:05:43,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:05:43,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:05:43,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:43,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:43,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:43,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:43,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:43,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:43,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:43,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:43,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:43,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:43,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146692563] [2021-05-03 14:05:43,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:43,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:43,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:43,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:43,642 INFO L87 Difference]: Start difference. First operand 397 states and 1181 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:43,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:43,999 INFO L93 Difference]: Finished difference Result 450 states and 1270 transitions. [2021-05-03 14:05:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:05:43,999 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:44,000 INFO L225 Difference]: With dead ends: 450 [2021-05-03 14:05:44,000 INFO L226 Difference]: Without dead ends: 445 [2021-05-03 14:05:44,001 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:44,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-05-03 14:05:44,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 399. [2021-05-03 14:05:44,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.979899497487437) internal successors, (1186), 398 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:44,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1186 transitions. [2021-05-03 14:05:44,007 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1186 transitions. Word has length 17 [2021-05-03 14:05:44,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:44,007 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 1186 transitions. [2021-05-03 14:05:44,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:44,008 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1186 transitions. [2021-05-03 14:05:44,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:44,008 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:44,008 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:44,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1628,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:44,229 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:44,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:44,229 INFO L82 PathProgramCache]: Analyzing trace with hash -414891048, now seen corresponding path program 109 times [2021-05-03 14:05:44,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:44,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565621933] [2021-05-03 14:05:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:44,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565621933] [2021-05-03 14:05:44,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474206703] [2021-05-03 14:05:44,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:05:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:44,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:05:44,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:44,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:44,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:05:44,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789958300] [2021-05-03 14:05:44,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:05:44,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:44,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:05:44,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:44,316 INFO L87 Difference]: Start difference. First operand 399 states and 1186 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:44,394 INFO L93 Difference]: Finished difference Result 520 states and 1374 transitions. [2021-05-03 14:05:44,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:05:44,395 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:44,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:44,396 INFO L225 Difference]: With dead ends: 520 [2021-05-03 14:05:44,396 INFO L226 Difference]: Without dead ends: 520 [2021-05-03 14:05:44,396 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-05-03 14:05:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 396. [2021-05-03 14:05:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.969620253164557) internal successors, (1173), 395 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1173 transitions. [2021-05-03 14:05:44,402 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1173 transitions. Word has length 17 [2021-05-03 14:05:44,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:44,403 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 1173 transitions. [2021-05-03 14:05:44,403 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) [2021-05-03 14:05:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1173 transitions. [2021-05-03 14:05:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:44,403 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:44,403 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:44,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1653 [2021-05-03 14:05:44,617 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:44,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:44,617 INFO L82 PathProgramCache]: Analyzing trace with hash -596654797, now seen corresponding path program 110 times [2021-05-03 14:05:44,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:44,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418557912] [2021-05-03 14:05:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:44,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418557912] [2021-05-03 14:05:44,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80824298] [2021-05-03 14:05:44,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:44,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:44,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:44,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:44,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:44,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:44,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:44,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:44,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:44,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:44,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:44,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:44,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 14:05:44,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600301544] [2021-05-03 14:05:44,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:05:44,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:44,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:05:44,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:44,992 INFO L87 Difference]: Start difference. First operand 396 states and 1173 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:45,264 INFO L93 Difference]: Finished difference Result 459 states and 1275 transitions. [2021-05-03 14:05:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:05:45,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:45,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:45,265 INFO L225 Difference]: With dead ends: 459 [2021-05-03 14:05:45,266 INFO L226 Difference]: Without dead ends: 454 [2021-05-03 14:05:45,266 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 296.5ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:45,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-05-03 14:05:45,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 396. [2021-05-03 14:05:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.969620253164557) internal successors, (1173), 395 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1173 transitions. [2021-05-03 14:05:45,272 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1173 transitions. Word has length 17 [2021-05-03 14:05:45,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:45,272 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 1173 transitions. [2021-05-03 14:05:45,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:45,272 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1173 transitions. [2021-05-03 14:05:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:45,272 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:45,272 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:45,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1654,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:45,490 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:45,490 INFO L82 PathProgramCache]: Analyzing trace with hash 122964530, now seen corresponding path program 111 times [2021-05-03 14:05:45,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:45,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326876636] [2021-05-03 14:05:45,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:45,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326876636] [2021-05-03 14:05:45,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546398805] [2021-05-03 14:05:45,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:45,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:05:45,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:45,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:05:45,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:45,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:45,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:05:45,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078981481] [2021-05-03 14:05:45,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:05:45,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:45,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:05:45,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:45,592 INFO L87 Difference]: Start difference. First operand 396 states and 1173 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:45,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:45,646 INFO L93 Difference]: Finished difference Result 484 states and 1366 transitions. [2021-05-03 14:05:45,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:05:45,647 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:45,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:45,648 INFO L225 Difference]: With dead ends: 484 [2021-05-03 14:05:45,648 INFO L226 Difference]: Without dead ends: 484 [2021-05-03 14:05:45,648 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:45,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-05-03 14:05:45,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 431. [2021-05-03 14:05:45,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.974418604651163) internal successors, (1279), 430 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:45,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1279 transitions. [2021-05-03 14:05:45,652 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1279 transitions. Word has length 17 [2021-05-03 14:05:45,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:45,653 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 1279 transitions. [2021-05-03 14:05:45,653 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) [2021-05-03 14:05:45,653 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1279 transitions. [2021-05-03 14:05:45,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:45,653 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:45,653 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:45,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1684 [2021-05-03 14:05:45,875 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:45,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:45,875 INFO L82 PathProgramCache]: Analyzing trace with hash 497436791, now seen corresponding path program 112 times [2021-05-03 14:05:45,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:45,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969048662] [2021-05-03 14:05:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:45,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969048662] [2021-05-03 14:05:45,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759964544] [2021-05-03 14:05:45,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:45,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:45,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:45,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:45,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:46,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:46,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:46,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:46,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:46,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:46,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:46,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:46,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:46,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408623733] [2021-05-03 14:05:46,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:46,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:46,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:46,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:46,238 INFO L87 Difference]: Start difference. First operand 431 states and 1279 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:46,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:46,582 INFO L93 Difference]: Finished difference Result 508 states and 1390 transitions. [2021-05-03 14:05:46,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:46,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:46,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:46,583 INFO L225 Difference]: With dead ends: 508 [2021-05-03 14:05:46,583 INFO L226 Difference]: Without dead ends: 493 [2021-05-03 14:05:46,584 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 291.9ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:46,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-05-03 14:05:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 431. [2021-05-03 14:05:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.969767441860465) internal successors, (1277), 430 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1277 transitions. [2021-05-03 14:05:46,588 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1277 transitions. Word has length 17 [2021-05-03 14:05:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:46,588 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 1277 transitions. [2021-05-03 14:05:46,588 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) [2021-05-03 14:05:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1277 transitions. [2021-05-03 14:05:46,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:46,589 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:46,589 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:46,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1685,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:46,789 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:46,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:46,790 INFO L82 PathProgramCache]: Analyzing trace with hash -383381736, now seen corresponding path program 113 times [2021-05-03 14:05:46,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:46,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178239755] [2021-05-03 14:05:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:46,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178239755] [2021-05-03 14:05:46,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624616098] [2021-05-03 14:05:46,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:46,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:05:46,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:46,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:05:46,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:46,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:46,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:05:46,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753506249] [2021-05-03 14:05:46,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:05:46,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:46,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:05:46,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:05:46,897 INFO L87 Difference]: Start difference. First operand 431 states and 1277 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:46,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:46,990 INFO L93 Difference]: Finished difference Result 511 states and 1418 transitions. [2021-05-03 14:05:46,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:05:46,990 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:46,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:46,991 INFO L225 Difference]: With dead ends: 511 [2021-05-03 14:05:46,991 INFO L226 Difference]: Without dead ends: 511 [2021-05-03 14:05:46,991 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:46,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-05-03 14:05:46,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 438. [2021-05-03 14:05:46,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.9702517162471396) internal successors, (1298), 437 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:46,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1298 transitions. [2021-05-03 14:05:46,998 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1298 transitions. Word has length 17 [2021-05-03 14:05:46,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:46,998 INFO L480 AbstractCegarLoop]: Abstraction has 438 states and 1298 transitions. [2021-05-03 14:05:46,998 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) [2021-05-03 14:05:46,998 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1298 transitions. [2021-05-03 14:05:46,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:46,999 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:46,999 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:47,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1719,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:47,213 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:47,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:47,213 INFO L82 PathProgramCache]: Analyzing trace with hash 54537651, now seen corresponding path program 114 times [2021-05-03 14:05:47,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:47,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282133259] [2021-05-03 14:05:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:47,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282133259] [2021-05-03 14:05:47,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090398459] [2021-05-03 14:05:47,285 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:47,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:05:47,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:47,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:47,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:47,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:47,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:05:47,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:47,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:47,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:47,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:05:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:47,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:47,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 14:05:47,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886511636] [2021-05-03 14:05:47,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:05:47,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:47,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:05:47,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:47,553 INFO L87 Difference]: Start difference. First operand 438 states and 1298 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:47,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:47,913 INFO L93 Difference]: Finished difference Result 574 states and 1607 transitions. [2021-05-03 14:05:47,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:05:47,913 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:47,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:47,915 INFO L225 Difference]: With dead ends: 574 [2021-05-03 14:05:47,915 INFO L226 Difference]: Without dead ends: 569 [2021-05-03 14:05:47,915 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 305.3ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-05-03 14:05:47,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 440. [2021-05-03 14:05:47,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.9635535307517085) internal successors, (1301), 439 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:47,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1301 transitions. [2021-05-03 14:05:47,922 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1301 transitions. Word has length 17 [2021-05-03 14:05:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:47,923 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 1301 transitions. [2021-05-03 14:05:47,923 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) [2021-05-03 14:05:47,923 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1301 transitions. [2021-05-03 14:05:47,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:05:47,923 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:47,923 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:48,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1720 [2021-05-03 14:05:48,145 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:48,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:48,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1099753202, now seen corresponding path program 115 times [2021-05-03 14:05:48,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:48,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392910921] [2021-05-03 14:05:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:48,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392910921] [2021-05-03 14:05:48,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214976062] [2021-05-03 14:05:48,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:48,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:05:48,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:48,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:48,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:05:48,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433088790] [2021-05-03 14:05:48,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:05:48,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:48,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:05:48,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:05:48,240 INFO L87 Difference]: Start difference. First operand 440 states and 1301 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:48,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:48,364 INFO L93 Difference]: Finished difference Result 560 states and 1538 transitions. [2021-05-03 14:05:48,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:48,364 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:05:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:48,365 INFO L225 Difference]: With dead ends: 560 [2021-05-03 14:05:48,365 INFO L226 Difference]: Without dead ends: 560 [2021-05-03 14:05:48,366 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:05:48,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-05-03 14:05:48,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 454. [2021-05-03 14:05:48,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.964679911699779) internal successors, (1343), 453 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:48,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1343 transitions. [2021-05-03 14:05:48,370 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1343 transitions. Word has length 17 [2021-05-03 14:05:48,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:48,371 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 1343 transitions. [2021-05-03 14:05:48,371 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) [2021-05-03 14:05:48,371 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1343 transitions. [2021-05-03 14:05:48,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:48,371 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:48,371 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:48,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1752 [2021-05-03 14:05:48,572 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:48,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:48,572 INFO L82 PathProgramCache]: Analyzing trace with hash -63868743, now seen corresponding path program 116 times [2021-05-03 14:05:48,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:48,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295488048] [2021-05-03 14:05:48,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:48,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295488048] [2021-05-03 14:05:48,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211861853] [2021-05-03 14:05:48,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:05:48,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:48,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:48,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:48,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:48,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:48,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:05:48,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007342126] [2021-05-03 14:05:48,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:05:48,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:48,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:05:48,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:05:48,702 INFO L87 Difference]: Start difference. First operand 454 states and 1343 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:48,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:48,819 INFO L93 Difference]: Finished difference Result 589 states and 1553 transitions. [2021-05-03 14:05:48,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:05:48,820 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 [2021-05-03 14:05:48,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:48,821 INFO L225 Difference]: With dead ends: 589 [2021-05-03 14:05:48,821 INFO L226 Difference]: Without dead ends: 585 [2021-05-03 14:05:48,821 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:48,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-05-03 14:05:48,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 449. [2021-05-03 14:05:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 2.9575892857142856) internal successors, (1325), 448 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1325 transitions. [2021-05-03 14:05:48,826 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1325 transitions. Word has length 18 [2021-05-03 14:05:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:48,826 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 1325 transitions. [2021-05-03 14:05:48,826 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) [2021-05-03 14:05:48,826 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1325 transitions. [2021-05-03 14:05:48,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:48,827 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:48,827 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:49,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1753,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:49,027 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:49,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:49,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1505890382, now seen corresponding path program 117 times [2021-05-03 14:05:49,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:49,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878067445] [2021-05-03 14:05:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:49,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878067445] [2021-05-03 14:05:49,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491607539] [2021-05-03 14:05:49,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:49,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:05:49,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:49,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:49,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:49,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:49,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:05:49,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013536313] [2021-05-03 14:05:49,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:05:49,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:49,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:05:49,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:05:49,137 INFO L87 Difference]: Start difference. First operand 449 states and 1325 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:49,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:49,286 INFO L93 Difference]: Finished difference Result 621 states and 1652 transitions. [2021-05-03 14:05:49,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:49,286 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 [2021-05-03 14:05:49,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:49,287 INFO L225 Difference]: With dead ends: 621 [2021-05-03 14:05:49,287 INFO L226 Difference]: Without dead ends: 614 [2021-05-03 14:05:49,287 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:49,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-05-03 14:05:49,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 459. [2021-05-03 14:05:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.9519650655021836) internal successors, (1352), 458 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1352 transitions. [2021-05-03 14:05:49,294 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1352 transitions. Word has length 18 [2021-05-03 14:05:49,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:49,294 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 1352 transitions. [2021-05-03 14:05:49,294 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) [2021-05-03 14:05:49,294 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1352 transitions. [2021-05-03 14:05:49,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:49,295 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:49,295 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:49,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1754 [2021-05-03 14:05:49,516 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:49,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1639250247, now seen corresponding path program 118 times [2021-05-03 14:05:49,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:49,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503277707] [2021-05-03 14:05:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:49,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503277707] [2021-05-03 14:05:49,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944817969] [2021-05-03 14:05:49,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:49,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:49,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:49,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:49,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:49,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:49,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:05:49,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752304060] [2021-05-03 14:05:49,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:05:49,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:49,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:05:49,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:49,604 INFO L87 Difference]: Start difference. First operand 459 states and 1352 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:49,692 INFO L93 Difference]: Finished difference Result 506 states and 1421 transitions. [2021-05-03 14:05:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:49,692 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:05:49,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:49,693 INFO L225 Difference]: With dead ends: 506 [2021-05-03 14:05:49,693 INFO L226 Difference]: Without dead ends: 502 [2021-05-03 14:05:49,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:49,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-05-03 14:05:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 459. [2021-05-03 14:05:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.945414847161572) internal successors, (1349), 458 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1349 transitions. [2021-05-03 14:05:49,701 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1349 transitions. Word has length 18 [2021-05-03 14:05:49,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:49,701 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 1349 transitions. [2021-05-03 14:05:49,701 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) [2021-05-03 14:05:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1349 transitions. [2021-05-03 14:05:49,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:49,702 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:49,702 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:49,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1755,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:49,923 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:49,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:49,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1019692920, now seen corresponding path program 119 times [2021-05-03 14:05:49,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:49,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591047192] [2021-05-03 14:05:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:49,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591047192] [2021-05-03 14:05:49,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108834688] [2021-05-03 14:05:49,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:49,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:05:49,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:49,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:49,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:50,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:50,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:05:50,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298597405] [2021-05-03 14:05:50,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:05:50,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:50,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:05:50,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:50,014 INFO L87 Difference]: Start difference. First operand 459 states and 1349 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:50,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:50,065 INFO L93 Difference]: Finished difference Result 603 states and 1587 transitions. [2021-05-03 14:05:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:05:50,065 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:05:50,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:50,066 INFO L225 Difference]: With dead ends: 603 [2021-05-03 14:05:50,066 INFO L226 Difference]: Without dead ends: 603 [2021-05-03 14:05:50,066 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:05:50,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-05-03 14:05:50,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 454. [2021-05-03 14:05:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.933774834437086) internal successors, (1329), 453 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1329 transitions. [2021-05-03 14:05:50,071 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1329 transitions. Word has length 18 [2021-05-03 14:05:50,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:50,071 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 1329 transitions. [2021-05-03 14:05:50,071 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) [2021-05-03 14:05:50,071 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1329 transitions. [2021-05-03 14:05:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:50,072 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:50,072 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:50,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1756 [2021-05-03 14:05:50,285 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:50,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1889932499, now seen corresponding path program 120 times [2021-05-03 14:05:50,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:50,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031437395] [2021-05-03 14:05:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:50,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031437395] [2021-05-03 14:05:50,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529987847] [2021-05-03 14:05:50,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:50,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:05:50,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:50,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:50,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:50,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:50,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:05:50,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945442130] [2021-05-03 14:05:50,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:05:50,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:50,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:05:50,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:50,372 INFO L87 Difference]: Start difference. First operand 454 states and 1329 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:50,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:50,471 INFO L93 Difference]: Finished difference Result 518 states and 1445 transitions. [2021-05-03 14:05:50,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:50,471 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:05:50,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:50,472 INFO L225 Difference]: With dead ends: 518 [2021-05-03 14:05:50,472 INFO L226 Difference]: Without dead ends: 514 [2021-05-03 14:05:50,472 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:50,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-05-03 14:05:50,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 454. [2021-05-03 14:05:50,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.9293598233995586) internal successors, (1327), 453 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1327 transitions. [2021-05-03 14:05:50,479 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1327 transitions. Word has length 18 [2021-05-03 14:05:50,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:50,479 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 1327 transitions. [2021-05-03 14:05:50,479 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) [2021-05-03 14:05:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1327 transitions. [2021-05-03 14:05:50,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:50,479 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:50,479 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:50,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1757,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:50,695 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:50,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:50,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1513713166, now seen corresponding path program 121 times [2021-05-03 14:05:50,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:50,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719203693] [2021-05-03 14:05:50,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:50,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719203693] [2021-05-03 14:05:50,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311558425] [2021-05-03 14:05:50,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:50,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:50,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:50,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:50,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:05:50,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473676693] [2021-05-03 14:05:50,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:05:50,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:50,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:05:50,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:50,816 INFO L87 Difference]: Start difference. First operand 454 states and 1327 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:50,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:50,894 INFO L93 Difference]: Finished difference Result 643 states and 1687 transitions. [2021-05-03 14:05:50,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:05:50,894 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:05:50,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:50,895 INFO L225 Difference]: With dead ends: 643 [2021-05-03 14:05:50,895 INFO L226 Difference]: Without dead ends: 643 [2021-05-03 14:05:50,895 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-05-03 14:05:50,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 454. [2021-05-03 14:05:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.9293598233995586) internal successors, (1327), 453 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1327 transitions. [2021-05-03 14:05:50,902 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1327 transitions. Word has length 18 [2021-05-03 14:05:50,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:50,902 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 1327 transitions. [2021-05-03 14:05:50,902 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) [2021-05-03 14:05:50,902 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1327 transitions. [2021-05-03 14:05:50,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:50,903 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:50,903 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:51,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1758 [2021-05-03 14:05:51,117 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:51,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:51,117 INFO L82 PathProgramCache]: Analyzing trace with hash 238012123, now seen corresponding path program 122 times [2021-05-03 14:05:51,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:51,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563100722] [2021-05-03 14:05:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:51,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563100722] [2021-05-03 14:05:51,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590467448] [2021-05-03 14:05:51,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:51,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:51,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:51,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:51,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:05:51,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:51,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:05:51,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165331289] [2021-05-03 14:05:51,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:05:51,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:51,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:05:51,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:05:51,236 INFO L87 Difference]: Start difference. First operand 454 states and 1327 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:51,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:51,295 INFO L93 Difference]: Finished difference Result 607 states and 1609 transitions. [2021-05-03 14:05:51,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:05:51,296 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:05:51,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:51,297 INFO L225 Difference]: With dead ends: 607 [2021-05-03 14:05:51,297 INFO L226 Difference]: Without dead ends: 605 [2021-05-03 14:05:51,297 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:05:51,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-05-03 14:05:51,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 455. [2021-05-03 14:05:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.909691629955947) internal successors, (1321), 454 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:51,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1321 transitions. [2021-05-03 14:05:51,304 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1321 transitions. Word has length 18 [2021-05-03 14:05:51,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:51,305 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 1321 transitions. [2021-05-03 14:05:51,305 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) [2021-05-03 14:05:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1321 transitions. [2021-05-03 14:05:51,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:51,305 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:51,305 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:51,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1759,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:51,521 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:51,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:51,521 INFO L82 PathProgramCache]: Analyzing trace with hash -539137476, now seen corresponding path program 123 times [2021-05-03 14:05:51,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:51,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313763390] [2021-05-03 14:05:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:51,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313763390] [2021-05-03 14:05:51,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72998522] [2021-05-03 14:05:51,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:51,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:05:51,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:51,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:51,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:05:51,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:51,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:05:51,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650469323] [2021-05-03 14:05:51,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:05:51,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:51,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:05:51,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:05:51,615 INFO L87 Difference]: Start difference. First operand 455 states and 1321 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:51,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:51,713 INFO L93 Difference]: Finished difference Result 580 states and 1522 transitions. [2021-05-03 14:05:51,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:05:51,714 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:05:51,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:51,715 INFO L225 Difference]: With dead ends: 580 [2021-05-03 14:05:51,715 INFO L226 Difference]: Without dead ends: 578 [2021-05-03 14:05:51,715 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:51,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-05-03 14:05:51,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 463. [2021-05-03 14:05:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.911255411255411) internal successors, (1345), 462 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:51,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1345 transitions. [2021-05-03 14:05:51,722 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1345 transitions. Word has length 18 [2021-05-03 14:05:51,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:51,722 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 1345 transitions. [2021-05-03 14:05:51,722 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) [2021-05-03 14:05:51,722 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1345 transitions. [2021-05-03 14:05:51,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:51,723 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:51,723 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:51,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1760 [2021-05-03 14:05:51,945 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:51,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:51,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1937661, now seen corresponding path program 124 times [2021-05-03 14:05:51,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:51,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610460909] [2021-05-03 14:05:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:51,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610460909] [2021-05-03 14:05:51,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449460888] [2021-05-03 14:05:51,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:52,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:52,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:52,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:52,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:52,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:52,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:05:52,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179040673] [2021-05-03 14:05:52,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:05:52,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:52,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:05:52,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:52,051 INFO L87 Difference]: Start difference. First operand 463 states and 1345 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:52,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:52,158 INFO L93 Difference]: Finished difference Result 556 states and 1501 transitions. [2021-05-03 14:05:52,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:52,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:05:52,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:52,159 INFO L225 Difference]: With dead ends: 556 [2021-05-03 14:05:52,159 INFO L226 Difference]: Without dead ends: 548 [2021-05-03 14:05:52,159 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:52,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-05-03 14:05:52,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 441. [2021-05-03 14:05:52,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.9204545454545454) internal successors, (1285), 440 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1285 transitions. [2021-05-03 14:05:52,166 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1285 transitions. Word has length 18 [2021-05-03 14:05:52,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:52,166 INFO L480 AbstractCegarLoop]: Abstraction has 441 states and 1285 transitions. [2021-05-03 14:05:52,166 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) [2021-05-03 14:05:52,166 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1285 transitions. [2021-05-03 14:05:52,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:52,166 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:52,166 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:52,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-05-03 14:05:52,367 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:52,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:52,367 INFO L82 PathProgramCache]: Analyzing trace with hash -889383970, now seen corresponding path program 125 times [2021-05-03 14:05:52,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:52,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22943060] [2021-05-03 14:05:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:52,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22943060] [2021-05-03 14:05:52,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863989018] [2021-05-03 14:05:52,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:52,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:05:52,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:52,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:52,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:52,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:52,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:05:52,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220396766] [2021-05-03 14:05:52,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:05:52,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:52,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:05:52,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:52,453 INFO L87 Difference]: Start difference. First operand 441 states and 1285 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:52,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:52,514 INFO L93 Difference]: Finished difference Result 589 states and 1530 transitions. [2021-05-03 14:05:52,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:05:52,514 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:05:52,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:52,515 INFO L225 Difference]: With dead ends: 589 [2021-05-03 14:05:52,515 INFO L226 Difference]: Without dead ends: 589 [2021-05-03 14:05:52,515 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:52,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-05-03 14:05:52,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 433. [2021-05-03 14:05:52,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.9074074074074074) internal successors, (1256), 432 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:52,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1256 transitions. [2021-05-03 14:05:52,520 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1256 transitions. Word has length 18 [2021-05-03 14:05:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:52,520 INFO L480 AbstractCegarLoop]: Abstraction has 433 states and 1256 transitions. [2021-05-03 14:05:52,520 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) [2021-05-03 14:05:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1256 transitions. [2021-05-03 14:05:52,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:52,521 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:52,521 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:52,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1762 [2021-05-03 14:05:52,721 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:52,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1071147719, now seen corresponding path program 126 times [2021-05-03 14:05:52,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:52,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847541592] [2021-05-03 14:05:52,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:52,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847541592] [2021-05-03 14:05:52,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459755704] [2021-05-03 14:05:52,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:52,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:05:52,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:52,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:52,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:52,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:52,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:05:52,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803395279] [2021-05-03 14:05:52,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:05:52,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:52,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:05:52,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:05:52,830 INFO L87 Difference]: Start difference. First operand 433 states and 1256 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:52,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:52,943 INFO L93 Difference]: Finished difference Result 534 states and 1436 transitions. [2021-05-03 14:05:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:05:52,944 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 [2021-05-03 14:05:52,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:52,944 INFO L225 Difference]: With dead ends: 534 [2021-05-03 14:05:52,944 INFO L226 Difference]: Without dead ends: 528 [2021-05-03 14:05:52,945 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:05:52,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-05-03 14:05:52,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 435. [2021-05-03 14:05:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.8940092165898617) internal successors, (1256), 434 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1256 transitions. [2021-05-03 14:05:52,951 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1256 transitions. Word has length 18 [2021-05-03 14:05:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:52,952 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 1256 transitions. [2021-05-03 14:05:52,952 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) [2021-05-03 14:05:52,952 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1256 transitions. [2021-05-03 14:05:52,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:52,952 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:52,952 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:53,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1763,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:53,174 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:53,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:53,175 INFO L82 PathProgramCache]: Analyzing trace with hash -351528392, now seen corresponding path program 127 times [2021-05-03 14:05:53,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:53,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821467883] [2021-05-03 14:05:53,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:53,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821467883] [2021-05-03 14:05:53,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483059953] [2021-05-03 14:05:53,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:53,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:53,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:53,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:53,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:05:53,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140759920] [2021-05-03 14:05:53,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:05:53,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:53,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:05:53,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:05:53,281 INFO L87 Difference]: Start difference. First operand 435 states and 1256 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:53,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:53,375 INFO L93 Difference]: Finished difference Result 650 states and 1663 transitions. [2021-05-03 14:05:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:05:53,375 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 [2021-05-03 14:05:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:53,376 INFO L225 Difference]: With dead ends: 650 [2021-05-03 14:05:53,376 INFO L226 Difference]: Without dead ends: 650 [2021-05-03 14:05:53,376 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:05:53,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-05-03 14:05:53,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 416. [2021-05-03 14:05:53,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.8891566265060242) internal successors, (1199), 415 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:53,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1199 transitions. [2021-05-03 14:05:53,381 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1199 transitions. Word has length 18 [2021-05-03 14:05:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:53,381 INFO L480 AbstractCegarLoop]: Abstraction has 416 states and 1199 transitions. [2021-05-03 14:05:53,381 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) [2021-05-03 14:05:53,381 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1199 transitions. [2021-05-03 14:05:53,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:53,381 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:53,381 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:53,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1764 [2021-05-03 14:05:53,582 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:53,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:53,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1243555061, now seen corresponding path program 128 times [2021-05-03 14:05:53,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:53,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925909496] [2021-05-03 14:05:53,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:53,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925909496] [2021-05-03 14:05:53,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087369649] [2021-05-03 14:05:53,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:53,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:53,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:53,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:53,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:53,728 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:05:53,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:53,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:05:53,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199408453] [2021-05-03 14:05:53,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:05:53,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:53,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:05:53,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:05:53,729 INFO L87 Difference]: Start difference. First operand 416 states and 1199 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:53,778 INFO L93 Difference]: Finished difference Result 564 states and 1469 transitions. [2021-05-03 14:05:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:05:53,779 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:05:53,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:53,779 INFO L225 Difference]: With dead ends: 564 [2021-05-03 14:05:53,779 INFO L226 Difference]: Without dead ends: 562 [2021-05-03 14:05:53,779 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:53,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-05-03 14:05:53,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 408. [2021-05-03 14:05:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.8746928746928746) internal successors, (1170), 407 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:53,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1170 transitions. [2021-05-03 14:05:53,784 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1170 transitions. Word has length 18 [2021-05-03 14:05:53,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:53,784 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1170 transitions. [2021-05-03 14:05:53,784 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) [2021-05-03 14:05:53,784 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1170 transitions. [2021-05-03 14:05:53,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:53,785 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:53,785 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:53,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1765 [2021-05-03 14:05:53,985 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:53,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:53,986 INFO L82 PathProgramCache]: Analyzing trace with hash -2020704660, now seen corresponding path program 129 times [2021-05-03 14:05:53,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:53,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72078403] [2021-05-03 14:05:53,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:54,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72078403] [2021-05-03 14:05:54,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221717781] [2021-05-03 14:05:54,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:54,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:05:54,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:54,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:54,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:05:54,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:54,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:05:54,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542099751] [2021-05-03 14:05:54,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:05:54,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:54,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:05:54,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:05:54,062 INFO L87 Difference]: Start difference. First operand 408 states and 1170 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:54,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:54,142 INFO L93 Difference]: Finished difference Result 517 states and 1347 transitions. [2021-05-03 14:05:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:05:54,142 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:05:54,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:54,143 INFO L225 Difference]: With dead ends: 517 [2021-05-03 14:05:54,143 INFO L226 Difference]: Without dead ends: 515 [2021-05-03 14:05:54,143 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:54,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-05-03 14:05:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 394. [2021-05-03 14:05:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.8575063613231553) internal successors, (1123), 393 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1123 transitions. [2021-05-03 14:05:54,149 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1123 transitions. Word has length 18 [2021-05-03 14:05:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:54,149 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 1123 transitions. [2021-05-03 14:05:54,149 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) [2021-05-03 14:05:54,150 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1123 transitions. [2021-05-03 14:05:54,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:54,150 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:54,150 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:54,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1766 [2021-05-03 14:05:54,360 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:54,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:54,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1742252393, now seen corresponding path program 130 times [2021-05-03 14:05:54,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:54,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112782098] [2021-05-03 14:05:54,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:54,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112782098] [2021-05-03 14:05:54,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491783089] [2021-05-03 14:05:54,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:54,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:54,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:54,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:54,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:54,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:54,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:05:54,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862139390] [2021-05-03 14:05:54,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:05:54,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:54,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:05:54,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:05:54,449 INFO L87 Difference]: Start difference. First operand 394 states and 1123 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:54,565 INFO L93 Difference]: Finished difference Result 504 states and 1317 transitions. [2021-05-03 14:05:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:54,565 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 [2021-05-03 14:05:54,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:54,566 INFO L225 Difference]: With dead ends: 504 [2021-05-03 14:05:54,566 INFO L226 Difference]: Without dead ends: 498 [2021-05-03 14:05:54,566 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:54,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-05-03 14:05:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 382. [2021-05-03 14:05:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.8451443569553807) internal successors, (1084), 381 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1084 transitions. [2021-05-03 14:05:54,570 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1084 transitions. Word has length 18 [2021-05-03 14:05:54,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:54,570 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1084 transitions. [2021-05-03 14:05:54,570 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) [2021-05-03 14:05:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1084 transitions. [2021-05-03 14:05:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:54,571 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:54,571 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:54,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1767,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:54,771 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:54,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:54,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1833095576, now seen corresponding path program 131 times [2021-05-03 14:05:54,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:54,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677986807] [2021-05-03 14:05:54,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:54,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677986807] [2021-05-03 14:05:54,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038143628] [2021-05-03 14:05:54,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:54,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:05:54,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:54,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:54,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:54,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:54,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:05:54,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122725270] [2021-05-03 14:05:54,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:05:54,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:54,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:05:54,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:05:54,869 INFO L87 Difference]: Start difference. First operand 382 states and 1084 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:54,954 INFO L93 Difference]: Finished difference Result 511 states and 1300 transitions. [2021-05-03 14:05:54,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:05:54,954 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 [2021-05-03 14:05:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:54,955 INFO L225 Difference]: With dead ends: 511 [2021-05-03 14:05:54,955 INFO L226 Difference]: Without dead ends: 511 [2021-05-03 14:05:54,955 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:54,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-05-03 14:05:54,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 377. [2021-05-03 14:05:54,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.8324468085106385) internal successors, (1065), 376 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1065 transitions. [2021-05-03 14:05:54,959 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1065 transitions. Word has length 18 [2021-05-03 14:05:54,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:54,959 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 1065 transitions. [2021-05-03 14:05:54,959 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) [2021-05-03 14:05:54,959 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1065 transitions. [2021-05-03 14:05:54,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:54,960 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:54,960 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:55,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1768 [2021-05-03 14:05:55,179 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:55,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1458623315, now seen corresponding path program 132 times [2021-05-03 14:05:55,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:55,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289950038] [2021-05-03 14:05:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:55,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289950038] [2021-05-03 14:05:55,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272076658] [2021-05-03 14:05:55,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:55,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:05:55,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:55,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:55,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:55,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:55,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:05:55,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023105510] [2021-05-03 14:05:55,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:05:55,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:55,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:05:55,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:05:55,270 INFO L87 Difference]: Start difference. First operand 377 states and 1065 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:55,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:55,361 INFO L93 Difference]: Finished difference Result 521 states and 1359 transitions. [2021-05-03 14:05:55,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:55,361 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 [2021-05-03 14:05:55,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:55,362 INFO L225 Difference]: With dead ends: 521 [2021-05-03 14:05:55,362 INFO L226 Difference]: Without dead ends: 513 [2021-05-03 14:05:55,362 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:55,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-05-03 14:05:55,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 377. [2021-05-03 14:05:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.8297872340425534) internal successors, (1064), 376 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1064 transitions. [2021-05-03 14:05:55,366 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1064 transitions. Word has length 18 [2021-05-03 14:05:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:55,366 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 1064 transitions. [2021-05-03 14:05:55,366 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) [2021-05-03 14:05:55,366 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1064 transitions. [2021-05-03 14:05:55,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:55,366 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:55,366 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:55,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1769,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:55,567 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:55,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:55,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1955525454, now seen corresponding path program 133 times [2021-05-03 14:05:55,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:55,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786166269] [2021-05-03 14:05:55,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:55,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786166269] [2021-05-03 14:05:55,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576046655] [2021-05-03 14:05:55,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:55,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:55,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:55,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:55,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:05:55,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256553438] [2021-05-03 14:05:55,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:05:55,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:55,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:05:55,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:05:55,663 INFO L87 Difference]: Start difference. First operand 377 states and 1064 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:55,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:55,789 INFO L93 Difference]: Finished difference Result 650 states and 1689 transitions. [2021-05-03 14:05:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:55,790 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 [2021-05-03 14:05:55,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:55,790 INFO L225 Difference]: With dead ends: 650 [2021-05-03 14:05:55,790 INFO L226 Difference]: Without dead ends: 650 [2021-05-03 14:05:55,791 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:05:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-05-03 14:05:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 394. [2021-05-03 14:05:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.8066157760814248) internal successors, (1103), 393 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1103 transitions. [2021-05-03 14:05:55,795 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1103 transitions. Word has length 18 [2021-05-03 14:05:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:55,795 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 1103 transitions. [2021-05-03 14:05:55,795 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) [2021-05-03 14:05:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1103 transitions. [2021-05-03 14:05:55,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:55,796 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:55,796 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:55,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-05-03 14:05:55,996 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:55,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:55,997 INFO L82 PathProgramCache]: Analyzing trace with hash 175561913, now seen corresponding path program 134 times [2021-05-03 14:05:55,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:55,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483530072] [2021-05-03 14:05:55,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:56,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483530072] [2021-05-03 14:05:56,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489329681] [2021-05-03 14:05:56,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:56,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:56,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:56,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:56,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:56,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:56,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:05:56,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159791328] [2021-05-03 14:05:56,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:05:56,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:56,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:05:56,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:56,086 INFO L87 Difference]: Start difference. First operand 394 states and 1103 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:56,160 INFO L93 Difference]: Finished difference Result 503 states and 1306 transitions. [2021-05-03 14:05:56,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:05:56,160 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:05:56,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:56,161 INFO L225 Difference]: With dead ends: 503 [2021-05-03 14:05:56,161 INFO L226 Difference]: Without dead ends: 503 [2021-05-03 14:05:56,161 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:56,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-05-03 14:05:56,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 398. [2021-05-03 14:05:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.808564231738035) internal successors, (1115), 397 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:56,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1115 transitions. [2021-05-03 14:05:56,165 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1115 transitions. Word has length 18 [2021-05-03 14:05:56,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:56,165 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 1115 transitions. [2021-05-03 14:05:56,165 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) [2021-05-03 14:05:56,165 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1115 transitions. [2021-05-03 14:05:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:56,165 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:56,165 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:56,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1771 [2021-05-03 14:05:56,366 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:56,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:56,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1853728120, now seen corresponding path program 135 times [2021-05-03 14:05:56,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:56,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191858260] [2021-05-03 14:05:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:56,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191858260] [2021-05-03 14:05:56,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266395533] [2021-05-03 14:05:56,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:56,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:05:56,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:56,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:56,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:56,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:56,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:05:56,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13618463] [2021-05-03 14:05:56,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:05:56,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:56,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:05:56,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:56,450 INFO L87 Difference]: Start difference. First operand 398 states and 1115 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:56,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:56,563 INFO L93 Difference]: Finished difference Result 494 states and 1259 transitions. [2021-05-03 14:05:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:56,564 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:05:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:56,564 INFO L225 Difference]: With dead ends: 494 [2021-05-03 14:05:56,564 INFO L226 Difference]: Without dead ends: 490 [2021-05-03 14:05:56,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:05:56,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-05-03 14:05:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 398. [2021-05-03 14:05:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.8060453400503778) internal successors, (1114), 397 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1114 transitions. [2021-05-03 14:05:56,568 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1114 transitions. Word has length 18 [2021-05-03 14:05:56,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:56,568 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 1114 transitions. [2021-05-03 14:05:56,568 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) [2021-05-03 14:05:56,569 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1114 transitions. [2021-05-03 14:05:56,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:56,569 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:56,569 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:56,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1772 [2021-05-03 14:05:56,770 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:56,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:56,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1124891415, now seen corresponding path program 136 times [2021-05-03 14:05:56,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:56,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884449035] [2021-05-03 14:05:56,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:56,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884449035] [2021-05-03 14:05:56,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350140903] [2021-05-03 14:05:56,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:56,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:56,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:56,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:56,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:56,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:56,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:05:56,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085096642] [2021-05-03 14:05:56,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:05:56,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:56,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:05:56,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:05:56,867 INFO L87 Difference]: Start difference. First operand 398 states and 1114 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:56,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:56,968 INFO L93 Difference]: Finished difference Result 544 states and 1417 transitions. [2021-05-03 14:05:56,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:05:56,968 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 [2021-05-03 14:05:56,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:56,969 INFO L225 Difference]: With dead ends: 544 [2021-05-03 14:05:56,969 INFO L226 Difference]: Without dead ends: 536 [2021-05-03 14:05:56,969 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:05:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-05-03 14:05:56,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 398. [2021-05-03 14:05:56,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.7984886649874054) internal successors, (1111), 397 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1111 transitions. [2021-05-03 14:05:56,973 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1111 transitions. Word has length 18 [2021-05-03 14:05:56,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:56,974 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 1111 transitions. [2021-05-03 14:05:56,974 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) [2021-05-03 14:05:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1111 transitions. [2021-05-03 14:05:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:56,974 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:56,974 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:57,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1773,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:57,175 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:57,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:57,175 INFO L82 PathProgramCache]: Analyzing trace with hash 244072888, now seen corresponding path program 137 times [2021-05-03 14:05:57,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:57,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623249463] [2021-05-03 14:05:57,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:57,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623249463] [2021-05-03 14:05:57,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122432164] [2021-05-03 14:05:57,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:57,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:05:57,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:57,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:57,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:57,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:57,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:05:57,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833513164] [2021-05-03 14:05:57,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:05:57,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:57,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:05:57,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:05:57,268 INFO L87 Difference]: Start difference. First operand 398 states and 1111 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:57,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:57,381 INFO L93 Difference]: Finished difference Result 600 states and 1559 transitions. [2021-05-03 14:05:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:05:57,381 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 [2021-05-03 14:05:57,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:57,382 INFO L225 Difference]: With dead ends: 600 [2021-05-03 14:05:57,382 INFO L226 Difference]: Without dead ends: 600 [2021-05-03 14:05:57,382 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:05:57,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-05-03 14:05:57,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 351. [2021-05-03 14:05:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.7857142857142856) internal successors, (975), 350 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 975 transitions. [2021-05-03 14:05:57,386 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 975 transitions. Word has length 18 [2021-05-03 14:05:57,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:57,386 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 975 transitions. [2021-05-03 14:05:57,386 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) [2021-05-03 14:05:57,386 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 975 transitions. [2021-05-03 14:05:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:57,387 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:57,387 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:57,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1774 [2021-05-03 14:05:57,587 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:57,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:57,587 INFO L82 PathProgramCache]: Analyzing trace with hash 72502491, now seen corresponding path program 138 times [2021-05-03 14:05:57,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:57,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701172531] [2021-05-03 14:05:57,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:57,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701172531] [2021-05-03 14:05:57,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984430951] [2021-05-03 14:05:57,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:57,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:05:57,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:57,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:57,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:57,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:57,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:05:57,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635647259] [2021-05-03 14:05:57,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:05:57,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:57,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:05:57,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:05:57,685 INFO L87 Difference]: Start difference. First operand 351 states and 975 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:57,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:57,727 INFO L93 Difference]: Finished difference Result 535 states and 1322 transitions. [2021-05-03 14:05:57,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:05:57,728 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:05:57,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:57,728 INFO L225 Difference]: With dead ends: 535 [2021-05-03 14:05:57,728 INFO L226 Difference]: Without dead ends: 535 [2021-05-03 14:05:57,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:57,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-05-03 14:05:57,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 363. [2021-05-03 14:05:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.820441988950276) internal successors, (1021), 362 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1021 transitions. [2021-05-03 14:05:57,732 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1021 transitions. Word has length 18 [2021-05-03 14:05:57,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:57,732 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 1021 transitions. [2021-05-03 14:05:57,732 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) [2021-05-03 14:05:57,732 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1021 transitions. [2021-05-03 14:05:57,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:57,733 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:57,733 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:57,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1775 [2021-05-03 14:05:57,948 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:57,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:57,948 INFO L82 PathProgramCache]: Analyzing trace with hash -704647108, now seen corresponding path program 139 times [2021-05-03 14:05:57,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:57,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202197514] [2021-05-03 14:05:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:57,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202197514] [2021-05-03 14:05:57,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123490258] [2021-05-03 14:05:57,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:57,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:57,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:58,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:58,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:05:58,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661584559] [2021-05-03 14:05:58,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:05:58,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:58,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:05:58,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:05:58,024 INFO L87 Difference]: Start difference. First operand 363 states and 1021 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:58,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:58,107 INFO L93 Difference]: Finished difference Result 446 states and 1156 transitions. [2021-05-03 14:05:58,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:05:58,107 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:05:58,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:58,108 INFO L225 Difference]: With dead ends: 446 [2021-05-03 14:05:58,108 INFO L226 Difference]: Without dead ends: 444 [2021-05-03 14:05:58,108 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:58,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-05-03 14:05:58,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 371. [2021-05-03 14:05:58,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.82972972972973) internal successors, (1047), 370 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1047 transitions. [2021-05-03 14:05:58,112 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1047 transitions. Word has length 18 [2021-05-03 14:05:58,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:58,112 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 1047 transitions. [2021-05-03 14:05:58,112 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) [2021-05-03 14:05:58,112 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1047 transitions. [2021-05-03 14:05:58,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:58,112 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:58,112 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:58,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1776,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:58,334 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:58,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:58,334 INFO L82 PathProgramCache]: Analyzing trace with hash -163571971, now seen corresponding path program 140 times [2021-05-03 14:05:58,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:58,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463125730] [2021-05-03 14:05:58,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:58,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463125730] [2021-05-03 14:05:58,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024508945] [2021-05-03 14:05:58,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:58,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:58,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:58,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:58,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:58,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:58,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:05:58,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680894148] [2021-05-03 14:05:58,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:05:58,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:58,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:05:58,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:58,418 INFO L87 Difference]: Start difference. First operand 371 states and 1047 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:58,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:58,522 INFO L93 Difference]: Finished difference Result 529 states and 1322 transitions. [2021-05-03 14:05:58,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:58,522 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:05:58,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:58,523 INFO L225 Difference]: With dead ends: 529 [2021-05-03 14:05:58,523 INFO L226 Difference]: Without dead ends: 523 [2021-05-03 14:05:58,523 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:58,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-05-03 14:05:58,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 371. [2021-05-03 14:05:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.8189189189189188) internal successors, (1043), 370 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:58,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1043 transitions. [2021-05-03 14:05:58,531 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1043 transitions. Word has length 18 [2021-05-03 14:05:58,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:58,531 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 1043 transitions. [2021-05-03 14:05:58,531 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) [2021-05-03 14:05:58,531 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1043 transitions. [2021-05-03 14:05:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:58,532 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:58,532 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:58,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1777 [2021-05-03 14:05:58,745 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:58,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1054893602, now seen corresponding path program 141 times [2021-05-03 14:05:58,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:58,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332055011] [2021-05-03 14:05:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:58,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332055011] [2021-05-03 14:05:58,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360320632] [2021-05-03 14:05:58,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:58,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:05:58,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:58,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:58,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:58,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:58,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:05:58,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318819961] [2021-05-03 14:05:58,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:05:58,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:58,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:05:58,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:05:58,832 INFO L87 Difference]: Start difference. First operand 371 states and 1043 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:58,896 INFO L93 Difference]: Finished difference Result 464 states and 1205 transitions. [2021-05-03 14:05:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:05:58,896 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:05:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:58,897 INFO L225 Difference]: With dead ends: 464 [2021-05-03 14:05:58,897 INFO L226 Difference]: Without dead ends: 464 [2021-05-03 14:05:58,897 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:58,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-05-03 14:05:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 353. [2021-05-03 14:05:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.7954545454545454) internal successors, (984), 352 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 984 transitions. [2021-05-03 14:05:58,901 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 984 transitions. Word has length 18 [2021-05-03 14:05:58,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:58,901 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 984 transitions. [2021-05-03 14:05:58,901 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) [2021-05-03 14:05:58,901 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 984 transitions. [2021-05-03 14:05:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:58,901 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:58,901 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:59,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1778,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:59,102 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:59,102 INFO L82 PathProgramCache]: Analyzing trace with hash -142565763, now seen corresponding path program 142 times [2021-05-03 14:05:59,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:59,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68559760] [2021-05-03 14:05:59,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:59,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68559760] [2021-05-03 14:05:59,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934658266] [2021-05-03 14:05:59,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:59,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:59,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:59,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:59,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:59,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:59,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:05:59,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643289000] [2021-05-03 14:05:59,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:05:59,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:59,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:05:59,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:05:59,228 INFO L87 Difference]: Start difference. First operand 353 states and 984 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:59,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:59,361 INFO L93 Difference]: Finished difference Result 494 states and 1235 transitions. [2021-05-03 14:05:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:05:59,362 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 [2021-05-03 14:05:59,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:59,362 INFO L225 Difference]: With dead ends: 494 [2021-05-03 14:05:59,362 INFO L226 Difference]: Without dead ends: 486 [2021-05-03 14:05:59,363 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:05:59,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-05-03 14:05:59,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 359. [2021-05-03 14:05:59,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.776536312849162) internal successors, (994), 358 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:59,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 994 transitions. [2021-05-03 14:05:59,366 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 994 transitions. Word has length 18 [2021-05-03 14:05:59,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:59,367 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 994 transitions. [2021-05-03 14:05:59,367 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) [2021-05-03 14:05:59,367 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 994 transitions. [2021-05-03 14:05:59,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:59,367 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:59,367 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:59,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1779,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:59,568 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:59,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:59,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1023384290, now seen corresponding path program 143 times [2021-05-03 14:05:59,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:59,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295442052] [2021-05-03 14:05:59,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:59,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295442052] [2021-05-03 14:05:59,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790796195] [2021-05-03 14:05:59,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:59,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:05:59,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:59,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:05:59,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:59,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:59,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:05:59,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991975292] [2021-05-03 14:05:59,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:05:59,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:59,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:05:59,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:05:59,684 INFO L87 Difference]: Start difference. First operand 359 states and 994 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:59,789 INFO L93 Difference]: Finished difference Result 473 states and 1180 transitions. [2021-05-03 14:05:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:05:59,790 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 [2021-05-03 14:05:59,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:59,790 INFO L225 Difference]: With dead ends: 473 [2021-05-03 14:05:59,790 INFO L226 Difference]: Without dead ends: 473 [2021-05-03 14:05:59,790 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:59,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-05-03 14:05:59,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 306. [2021-05-03 14:05:59,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.7147540983606557) internal successors, (828), 305 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 828 transitions. [2021-05-03 14:05:59,794 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 828 transitions. Word has length 18 [2021-05-03 14:05:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:59,794 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 828 transitions. [2021-05-03 14:05:59,794 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) [2021-05-03 14:05:59,794 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 828 transitions. [2021-05-03 14:05:59,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:05:59,794 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:59,794 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:59,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1780,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:59,996 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:59,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:59,996 INFO L82 PathProgramCache]: Analyzing trace with hash -585464903, now seen corresponding path program 144 times [2021-05-03 14:05:59,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:59,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142701962] [2021-05-03 14:05:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:00,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142701962] [2021-05-03 14:06:00,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68495962] [2021-05-03 14:06:00,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:00,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:06:00,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:00,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:00,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:00,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:00,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:06:00,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006003001] [2021-05-03 14:06:00,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:06:00,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:00,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:06:00,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:06:00,100 INFO L87 Difference]: Start difference. First operand 306 states and 828 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:00,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:00,184 INFO L93 Difference]: Finished difference Result 550 states and 1344 transitions. [2021-05-03 14:06:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:06:00,184 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 [2021-05-03 14:06:00,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:00,185 INFO L225 Difference]: With dead ends: 550 [2021-05-03 14:06:00,185 INFO L226 Difference]: Without dead ends: 540 [2021-05-03 14:06:00,185 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:06:00,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-05-03 14:06:00,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 317. [2021-05-03 14:06:00,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.6835443037974684) internal successors, (848), 316 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:00,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 848 transitions. [2021-05-03 14:06:00,189 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 848 transitions. Word has length 18 [2021-05-03 14:06:00,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:00,189 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 848 transitions. [2021-05-03 14:06:00,189 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) [2021-05-03 14:06:00,189 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 848 transitions. [2021-05-03 14:06:00,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:00,189 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:00,189 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:00,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1781 [2021-05-03 14:06:00,390 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:00,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:00,390 INFO L82 PathProgramCache]: Analyzing trace with hash 459750648, now seen corresponding path program 145 times [2021-05-03 14:06:00,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:00,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549805555] [2021-05-03 14:06:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:00,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549805555] [2021-05-03 14:06:00,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69737152] [2021-05-03 14:06:00,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:06:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:00,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:00,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:00,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:00,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:06:00,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822434814] [2021-05-03 14:06:00,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:06:00,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:00,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:06:00,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:06:00,505 INFO L87 Difference]: Start difference. First operand 317 states and 848 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:00,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:00,664 INFO L93 Difference]: Finished difference Result 534 states and 1298 transitions. [2021-05-03 14:06:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:06:00,664 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 [2021-05-03 14:06:00,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:00,665 INFO L225 Difference]: With dead ends: 534 [2021-05-03 14:06:00,665 INFO L226 Difference]: Without dead ends: 534 [2021-05-03 14:06:00,665 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:00,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-05-03 14:06:00,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 351. [2021-05-03 14:06:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.7085714285714286) internal successors, (948), 350 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 948 transitions. [2021-05-03 14:06:00,668 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 948 transitions. Word has length 18 [2021-05-03 14:06:00,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:00,668 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 948 transitions. [2021-05-03 14:06:00,668 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) [2021-05-03 14:06:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 948 transitions. [2021-05-03 14:06:00,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:00,669 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:00,669 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:00,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1782 [2021-05-03 14:06:00,869 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:00,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:00,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1339860081, now seen corresponding path program 146 times [2021-05-03 14:06:00,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:00,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357551460] [2021-05-03 14:06:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:00,911 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:00,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357551460] [2021-05-03 14:06:00,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11904081] [2021-05-03 14:06:00,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:00,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:00,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:00,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:00,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:00,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:00,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:06:00,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384469235] [2021-05-03 14:06:00,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:06:00,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:00,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:06:00,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:06:00,963 INFO L87 Difference]: Start difference. First operand 351 states and 948 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:01,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:01,035 INFO L93 Difference]: Finished difference Result 539 states and 1303 transitions. [2021-05-03 14:06:01,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:06:01,035 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:01,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:01,036 INFO L225 Difference]: With dead ends: 539 [2021-05-03 14:06:01,036 INFO L226 Difference]: Without dead ends: 539 [2021-05-03 14:06:01,036 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-05-03 14:06:01,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 380. [2021-05-03 14:06:01,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.7651715039577835) internal successors, (1048), 379 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1048 transitions. [2021-05-03 14:06:01,040 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1048 transitions. Word has length 18 [2021-05-03 14:06:01,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:01,040 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 1048 transitions. [2021-05-03 14:06:01,040 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) [2021-05-03 14:06:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1048 transitions. [2021-05-03 14:06:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:01,040 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:01,040 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:01,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1783 [2021-05-03 14:06:01,241 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:01,241 INFO L82 PathProgramCache]: Analyzing trace with hash 338306126, now seen corresponding path program 147 times [2021-05-03 14:06:01,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:01,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384947171] [2021-05-03 14:06:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:01,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384947171] [2021-05-03 14:06:01,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966101474] [2021-05-03 14:06:01,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:01,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:06:01,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:01,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:01,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:01,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:01,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:06:01,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193214331] [2021-05-03 14:06:01,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:06:01,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:01,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:06:01,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:06:01,338 INFO L87 Difference]: Start difference. First operand 380 states and 1048 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:01,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:01,474 INFO L93 Difference]: Finished difference Result 531 states and 1311 transitions. [2021-05-03 14:06:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:06:01,474 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:01,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:01,475 INFO L225 Difference]: With dead ends: 531 [2021-05-03 14:06:01,475 INFO L226 Difference]: Without dead ends: 527 [2021-05-03 14:06:01,475 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:06:01,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-05-03 14:06:01,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 393. [2021-05-03 14:06:01,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.7933673469387754) internal successors, (1095), 392 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:01,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1095 transitions. [2021-05-03 14:06:01,479 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1095 transitions. Word has length 18 [2021-05-03 14:06:01,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:01,480 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 1095 transitions. [2021-05-03 14:06:01,480 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) [2021-05-03 14:06:01,480 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1095 transitions. [2021-05-03 14:06:01,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:01,480 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:01,480 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:01,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1784 [2021-05-03 14:06:01,681 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:01,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:01,681 INFO L82 PathProgramCache]: Analyzing trace with hash 879381263, now seen corresponding path program 148 times [2021-05-03 14:06:01,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:01,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886701597] [2021-05-03 14:06:01,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:01,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886701597] [2021-05-03 14:06:01,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170724524] [2021-05-03 14:06:01,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:01,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:01,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:01,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:01,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:01,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:01,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:06:01,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690369878] [2021-05-03 14:06:01,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:06:01,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:01,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:06:01,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:06:01,766 INFO L87 Difference]: Start difference. First operand 393 states and 1095 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:01,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:01,856 INFO L93 Difference]: Finished difference Result 519 states and 1293 transitions. [2021-05-03 14:06:01,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:06:01,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:01,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:01,857 INFO L225 Difference]: With dead ends: 519 [2021-05-03 14:06:01,857 INFO L226 Difference]: Without dead ends: 517 [2021-05-03 14:06:01,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:01,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-05-03 14:06:01,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 391. [2021-05-03 14:06:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.7974358974358973) internal successors, (1091), 390 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1091 transitions. [2021-05-03 14:06:01,862 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1091 transitions. Word has length 18 [2021-05-03 14:06:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:01,862 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 1091 transitions. [2021-05-03 14:06:01,862 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) [2021-05-03 14:06:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1091 transitions. [2021-05-03 14:06:01,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:01,862 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:01,862 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:02,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1785 [2021-05-03 14:06:02,063 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:02,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:02,063 INFO L82 PathProgramCache]: Analyzing trace with hash -756642866, now seen corresponding path program 149 times [2021-05-03 14:06:02,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:02,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200989631] [2021-05-03 14:06:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:02,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200989631] [2021-05-03 14:06:02,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740176849] [2021-05-03 14:06:02,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:02,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:06:02,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:02,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:02,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:02,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:02,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:06:02,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760089449] [2021-05-03 14:06:02,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:06:02,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:02,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:06:02,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:06:02,170 INFO L87 Difference]: Start difference. First operand 391 states and 1091 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:02,234 INFO L93 Difference]: Finished difference Result 530 states and 1322 transitions. [2021-05-03 14:06:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:06:02,235 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:02,235 INFO L225 Difference]: With dead ends: 530 [2021-05-03 14:06:02,235 INFO L226 Difference]: Without dead ends: 530 [2021-05-03 14:06:02,235 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:06:02,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-05-03 14:06:02,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 392. [2021-05-03 14:06:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.78772378516624) internal successors, (1090), 391 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:02,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1090 transitions. [2021-05-03 14:06:02,240 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1090 transitions. Word has length 18 [2021-05-03 14:06:02,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:02,240 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 1090 transitions. [2021-05-03 14:06:02,240 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) [2021-05-03 14:06:02,240 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1090 transitions. [2021-05-03 14:06:02,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:02,240 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:02,240 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:02,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1786,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:02,441 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:02,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:02,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2100886897, now seen corresponding path program 150 times [2021-05-03 14:06:02,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:02,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449060568] [2021-05-03 14:06:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:02,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449060568] [2021-05-03 14:06:02,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996979072] [2021-05-03 14:06:02,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:02,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:06:02,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:02,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:02,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:02,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:02,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:06:02,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333740705] [2021-05-03 14:06:02,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:06:02,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:02,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:06:02,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:06:02,537 INFO L87 Difference]: Start difference. First operand 392 states and 1090 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:02,641 INFO L93 Difference]: Finished difference Result 597 states and 1517 transitions. [2021-05-03 14:06:02,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:06:02,642 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:02,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:02,642 INFO L225 Difference]: With dead ends: 597 [2021-05-03 14:06:02,642 INFO L226 Difference]: Without dead ends: 587 [2021-05-03 14:06:02,643 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:06:02,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-05-03 14:06:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 392. [2021-05-03 14:06:02,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.785166240409207) internal successors, (1089), 391 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:02,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1089 transitions. [2021-05-03 14:06:02,647 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1089 transitions. Word has length 18 [2021-05-03 14:06:02,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:02,647 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 1089 transitions. [2021-05-03 14:06:02,647 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) [2021-05-03 14:06:02,647 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1089 transitions. [2021-05-03 14:06:02,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:02,648 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:02,648 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:02,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1787 [2021-05-03 14:06:02,848 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:02,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:02,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1055671346, now seen corresponding path program 151 times [2021-05-03 14:06:02,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:02,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654981971] [2021-05-03 14:06:02,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:02,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654981971] [2021-05-03 14:06:02,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833036426] [2021-05-03 14:06:02,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:02,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:02,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:02,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:02,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:06:02,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717533086] [2021-05-03 14:06:02,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:06:02,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:02,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:06:02,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:06:02,954 INFO L87 Difference]: Start difference. First operand 392 states and 1089 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:03,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:03,112 INFO L93 Difference]: Finished difference Result 529 states and 1361 transitions. [2021-05-03 14:06:03,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:06:03,113 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:03,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:03,113 INFO L225 Difference]: With dead ends: 529 [2021-05-03 14:06:03,113 INFO L226 Difference]: Without dead ends: 529 [2021-05-03 14:06:03,113 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-05-03 14:06:03,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 385. [2021-05-03 14:06:03,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.78125) internal successors, (1068), 384 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1068 transitions. [2021-05-03 14:06:03,117 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1068 transitions. Word has length 18 [2021-05-03 14:06:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:03,117 INFO L480 AbstractCegarLoop]: Abstraction has 385 states and 1068 transitions. [2021-05-03 14:06:03,117 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) [2021-05-03 14:06:03,118 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1068 transitions. [2021-05-03 14:06:03,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:03,118 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:03,118 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:03,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1788,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:03,319 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:03,319 INFO L82 PathProgramCache]: Analyzing trace with hash -2079386357, now seen corresponding path program 152 times [2021-05-03 14:06:03,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:03,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885971018] [2021-05-03 14:06:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:03,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885971018] [2021-05-03 14:06:03,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660421793] [2021-05-03 14:06:03,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:03,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:03,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:03,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:03,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:03,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:03,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:06:03,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688896253] [2021-05-03 14:06:03,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:06:03,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:03,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:06:03,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:06:03,403 INFO L87 Difference]: Start difference. First operand 385 states and 1068 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:03,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:03,453 INFO L93 Difference]: Finished difference Result 612 states and 1535 transitions. [2021-05-03 14:06:03,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:06:03,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:03,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:03,455 INFO L225 Difference]: With dead ends: 612 [2021-05-03 14:06:03,455 INFO L226 Difference]: Without dead ends: 612 [2021-05-03 14:06:03,455 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:06:03,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-05-03 14:06:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 441. [2021-05-03 14:06:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.8545454545454545) internal successors, (1256), 440 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1256 transitions. [2021-05-03 14:06:03,460 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1256 transitions. Word has length 18 [2021-05-03 14:06:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:03,460 INFO L480 AbstractCegarLoop]: Abstraction has 441 states and 1256 transitions. [2021-05-03 14:06:03,460 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) [2021-05-03 14:06:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1256 transitions. [2021-05-03 14:06:03,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:03,460 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:03,460 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:03,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1789,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:03,661 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:03,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:03,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1438431340, now seen corresponding path program 153 times [2021-05-03 14:06:03,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:03,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912215971] [2021-05-03 14:06:03,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:03,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912215971] [2021-05-03 14:06:03,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908523180] [2021-05-03 14:06:03,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:03,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:06:03,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:03,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:03,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:03,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:03,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:06:03,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546555607] [2021-05-03 14:06:03,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:06:03,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:03,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:06:03,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:06:03,745 INFO L87 Difference]: Start difference. First operand 441 states and 1256 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:03,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:03,856 INFO L93 Difference]: Finished difference Result 564 states and 1468 transitions. [2021-05-03 14:06:03,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:06:03,856 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:03,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:03,857 INFO L225 Difference]: With dead ends: 564 [2021-05-03 14:06:03,857 INFO L226 Difference]: Without dead ends: 562 [2021-05-03 14:06:03,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-05-03 14:06:03,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 455. [2021-05-03 14:06:03,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.8788546255506606) internal successors, (1307), 454 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1307 transitions. [2021-05-03 14:06:03,862 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1307 transitions. Word has length 18 [2021-05-03 14:06:03,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:03,862 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 1307 transitions. [2021-05-03 14:06:03,862 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) [2021-05-03 14:06:03,862 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1307 transitions. [2021-05-03 14:06:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:03,862 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:03,862 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:04,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1790,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:04,065 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:04,065 INFO L82 PathProgramCache]: Analyzing trace with hash 490101481, now seen corresponding path program 154 times [2021-05-03 14:06:04,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:04,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055672794] [2021-05-03 14:06:04,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:04,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055672794] [2021-05-03 14:06:04,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988540814] [2021-05-03 14:06:04,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:04,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:04,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:04,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:04,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:04,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:04,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:06:04,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287682659] [2021-05-03 14:06:04,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:06:04,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:04,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:06:04,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:06:04,163 INFO L87 Difference]: Start difference. First operand 455 states and 1307 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:04,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:04,262 INFO L93 Difference]: Finished difference Result 609 states and 1555 transitions. [2021-05-03 14:06:04,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:06:04,263 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:04,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:04,263 INFO L225 Difference]: With dead ends: 609 [2021-05-03 14:06:04,263 INFO L226 Difference]: Without dead ends: 607 [2021-05-03 14:06:04,263 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-05-03 14:06:04,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 455. [2021-05-03 14:06:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.8766519823788546) internal successors, (1306), 454 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1306 transitions. [2021-05-03 14:06:04,269 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1306 transitions. Word has length 18 [2021-05-03 14:06:04,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:04,269 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 1306 transitions. [2021-05-03 14:06:04,269 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) [2021-05-03 14:06:04,269 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1306 transitions. [2021-05-03 14:06:04,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:04,270 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:04,270 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:04,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1791,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:04,470 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:04,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:04,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1145922648, now seen corresponding path program 155 times [2021-05-03 14:06:04,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:04,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856499924] [2021-05-03 14:06:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:04,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856499924] [2021-05-03 14:06:04,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424083428] [2021-05-03 14:06:04,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:04,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:06:04,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:04,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:04,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:04,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:04,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:06:04,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61859178] [2021-05-03 14:06:04,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:06:04,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:04,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:06:04,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:06:04,562 INFO L87 Difference]: Start difference. First operand 455 states and 1306 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:04,629 INFO L93 Difference]: Finished difference Result 584 states and 1520 transitions. [2021-05-03 14:06:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:06:04,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:04,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:04,630 INFO L225 Difference]: With dead ends: 584 [2021-05-03 14:06:04,630 INFO L226 Difference]: Without dead ends: 584 [2021-05-03 14:06:04,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:04,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-05-03 14:06:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 459. [2021-05-03 14:06:04,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.8777292576419216) internal successors, (1318), 458 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1318 transitions. [2021-05-03 14:06:04,635 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1318 transitions. Word has length 18 [2021-05-03 14:06:04,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:04,635 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 1318 transitions. [2021-05-03 14:06:04,636 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) [2021-05-03 14:06:04,636 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1318 transitions. [2021-05-03 14:06:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:04,636 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:04,636 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:04,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1792 [2021-05-03 14:06:04,839 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:04,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:04,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1979506477, now seen corresponding path program 156 times [2021-05-03 14:06:04,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:04,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289554156] [2021-05-03 14:06:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:04,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289554156] [2021-05-03 14:06:04,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527089133] [2021-05-03 14:06:04,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:04,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:06:04,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:04,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:04,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:04,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:04,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:06:04,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795926016] [2021-05-03 14:06:04,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:06:04,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:04,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:06:04,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:06:04,920 INFO L87 Difference]: Start difference. First operand 459 states and 1318 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:05,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:05,014 INFO L93 Difference]: Finished difference Result 652 states and 1678 transitions. [2021-05-03 14:06:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:06:05,014 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:05,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:05,015 INFO L225 Difference]: With dead ends: 652 [2021-05-03 14:06:05,015 INFO L226 Difference]: Without dead ends: 648 [2021-05-03 14:06:05,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-05-03 14:06:05,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 459. [2021-05-03 14:06:05,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.8755458515283845) internal successors, (1317), 458 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1317 transitions. [2021-05-03 14:06:05,020 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1317 transitions. Word has length 18 [2021-05-03 14:06:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:05,020 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 1317 transitions. [2021-05-03 14:06:05,020 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) [2021-05-03 14:06:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1317 transitions. [2021-05-03 14:06:05,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:05,021 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:05,021 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:05,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1793 [2021-05-03 14:06:05,221 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:05,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:05,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1088184846, now seen corresponding path program 157 times [2021-05-03 14:06:05,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:05,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547696720] [2021-05-03 14:06:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:05,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547696720] [2021-05-03 14:06:05,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863608975] [2021-05-03 14:06:05,259 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 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 [2021-05-03 14:06:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:05,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:05,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:05,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:05,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:06:05,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146102800] [2021-05-03 14:06:05,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:06:05,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:05,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:06:05,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:06:05,310 INFO L87 Difference]: Start difference. First operand 459 states and 1317 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:05,387 INFO L93 Difference]: Finished difference Result 559 states and 1507 transitions. [2021-05-03 14:06:05,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:06:05,388 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:05,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:05,388 INFO L225 Difference]: With dead ends: 559 [2021-05-03 14:06:05,388 INFO L226 Difference]: Without dead ends: 559 [2021-05-03 14:06:05,388 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:05,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-05-03 14:06:05,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 471. [2021-05-03 14:06:05,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.882978723404255) internal successors, (1355), 470 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1355 transitions. [2021-05-03 14:06:05,393 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1355 transitions. Word has length 18 [2021-05-03 14:06:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:05,393 INFO L480 AbstractCegarLoop]: Abstraction has 471 states and 1355 transitions. [2021-05-03 14:06:05,393 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) [2021-05-03 14:06:05,393 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1355 transitions. [2021-05-03 14:06:05,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:05,394 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:05,394 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:05,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1794,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:05,594 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:05,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:05,595 INFO L82 PathProgramCache]: Analyzing trace with hash 906421097, now seen corresponding path program 158 times [2021-05-03 14:06:05,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:05,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097671824] [2021-05-03 14:06:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:05,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097671824] [2021-05-03 14:06:05,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542427461] [2021-05-03 14:06:05,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:05,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:05,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:05,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:05,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:05,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:05,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:06:05,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093132246] [2021-05-03 14:06:05,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:06:05,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:05,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:06:05,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:06:05,696 INFO L87 Difference]: Start difference. First operand 471 states and 1355 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:05,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:05,804 INFO L93 Difference]: Finished difference Result 682 states and 1750 transitions. [2021-05-03 14:06:05,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:06:05,805 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:05,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:05,806 INFO L225 Difference]: With dead ends: 682 [2021-05-03 14:06:05,806 INFO L226 Difference]: Without dead ends: 676 [2021-05-03 14:06:05,806 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:06:05,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-05-03 14:06:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 482. [2021-05-03 14:06:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.9022869022869022) internal successors, (1396), 481 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:05,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1396 transitions. [2021-05-03 14:06:05,811 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1396 transitions. Word has length 18 [2021-05-03 14:06:05,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:05,811 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 1396 transitions. [2021-05-03 14:06:05,811 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) [2021-05-03 14:06:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1396 transitions. [2021-05-03 14:06:05,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:05,812 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:05,812 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:06,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1795 [2021-05-03 14:06:06,025 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:06,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:06,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1626040424, now seen corresponding path program 159 times [2021-05-03 14:06:06,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:06,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102197149] [2021-05-03 14:06:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:06,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102197149] [2021-05-03 14:06:06,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394763844] [2021-05-03 14:06:06,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:06,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:06:06,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:06,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:06,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:06,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:06,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:06:06,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394258318] [2021-05-03 14:06:06,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:06:06,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:06,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:06:06,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:06:06,119 INFO L87 Difference]: Start difference. First operand 482 states and 1396 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:06,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:06,201 INFO L93 Difference]: Finished difference Result 581 states and 1569 transitions. [2021-05-03 14:06:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:06:06,201 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:06,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:06,202 INFO L225 Difference]: With dead ends: 581 [2021-05-03 14:06:06,202 INFO L226 Difference]: Without dead ends: 579 [2021-05-03 14:06:06,202 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:06:06,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-05-03 14:06:06,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 483. [2021-05-03 14:06:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.9024896265560165) internal successors, (1399), 482 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1399 transitions. [2021-05-03 14:06:06,207 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1399 transitions. Word has length 18 [2021-05-03 14:06:06,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:06,207 INFO L480 AbstractCegarLoop]: Abstraction has 483 states and 1399 transitions. [2021-05-03 14:06:06,207 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) [2021-05-03 14:06:06,207 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1399 transitions. [2021-05-03 14:06:06,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:06,207 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:06,207 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:06,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-05-03 14:06:06,408 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:06,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:06,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1119694158, now seen corresponding path program 160 times [2021-05-03 14:06:06,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:06,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213559262] [2021-05-03 14:06:06,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:06,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213559262] [2021-05-03 14:06:06,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954499012] [2021-05-03 14:06:06,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:06,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:06,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:06,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:06,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:06,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:06,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:06:06,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169703835] [2021-05-03 14:06:06,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:06:06,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:06,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:06:06,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:06:06,503 INFO L87 Difference]: Start difference. First operand 483 states and 1399 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:06,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:06,566 INFO L93 Difference]: Finished difference Result 540 states and 1521 transitions. [2021-05-03 14:06:06,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:06:06,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:06,567 INFO L225 Difference]: With dead ends: 540 [2021-05-03 14:06:06,567 INFO L226 Difference]: Without dead ends: 540 [2021-05-03 14:06:06,567 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:06,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-05-03 14:06:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 503. [2021-05-03 14:06:06,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.902390438247012) internal successors, (1457), 502 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:06,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1457 transitions. [2021-05-03 14:06:06,572 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1457 transitions. Word has length 18 [2021-05-03 14:06:06,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:06,572 INFO L480 AbstractCegarLoop]: Abstraction has 503 states and 1457 transitions. [2021-05-03 14:06:06,572 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) [2021-05-03 14:06:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1457 transitions. [2021-05-03 14:06:06,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:06,572 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:06,572 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:06,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1797 [2021-05-03 14:06:06,773 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:06,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1557613545, now seen corresponding path program 161 times [2021-05-03 14:06:06,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:06,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031481874] [2021-05-03 14:06:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:06,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031481874] [2021-05-03 14:06:06,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879223816] [2021-05-03 14:06:06,817 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 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 [2021-05-03 14:06:06,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:06:06,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:06,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:06,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:06,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:06,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:06:06,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115650305] [2021-05-03 14:06:06,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:06:06,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:06,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:06:06,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:06:06,870 INFO L87 Difference]: Start difference. First operand 503 states and 1457 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:06,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:06,997 INFO L93 Difference]: Finished difference Result 774 states and 2053 transitions. [2021-05-03 14:06:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:06:06,997 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:06,998 INFO L225 Difference]: With dead ends: 774 [2021-05-03 14:06:06,998 INFO L226 Difference]: Without dead ends: 764 [2021-05-03 14:06:06,998 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:06:06,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-05-03 14:06:07,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 506. [2021-05-03 14:06:07,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.899009900990099) internal successors, (1464), 505 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1464 transitions. [2021-05-03 14:06:07,006 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1464 transitions. Word has length 18 [2021-05-03 14:06:07,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:07,006 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1464 transitions. [2021-05-03 14:06:07,006 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) [2021-05-03 14:06:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1464 transitions. [2021-05-03 14:06:07,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:07,007 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:07,007 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:07,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1798,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:07,213 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:07,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:07,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1692138200, now seen corresponding path program 162 times [2021-05-03 14:06:07,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:07,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019678597] [2021-05-03 14:06:07,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:07,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019678597] [2021-05-03 14:06:07,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641601034] [2021-05-03 14:06:07,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:07,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:06:07,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:07,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:07,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:07,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:07,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:06:07,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020030032] [2021-05-03 14:06:07,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:06:07,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:07,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:06:07,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:06:07,329 INFO L87 Difference]: Start difference. First operand 506 states and 1464 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:07,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:07,448 INFO L93 Difference]: Finished difference Result 573 states and 1584 transitions. [2021-05-03 14:06:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:06:07,449 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:07,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:07,450 INFO L225 Difference]: With dead ends: 573 [2021-05-03 14:06:07,450 INFO L226 Difference]: Without dead ends: 573 [2021-05-03 14:06:07,450 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:06:07,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-05-03 14:06:07,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 506. [2021-05-03 14:06:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.899009900990099) internal successors, (1464), 505 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1464 transitions. [2021-05-03 14:06:07,455 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1464 transitions. Word has length 18 [2021-05-03 14:06:07,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:07,455 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1464 transitions. [2021-05-03 14:06:07,455 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) [2021-05-03 14:06:07,455 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1464 transitions. [2021-05-03 14:06:07,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:07,456 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:07,456 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:07,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1799 [2021-05-03 14:06:07,656 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:07,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:07,657 INFO L82 PathProgramCache]: Analyzing trace with hash 712642093, now seen corresponding path program 163 times [2021-05-03 14:06:07,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:07,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374516171] [2021-05-03 14:06:07,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:07,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374516171] [2021-05-03 14:06:07,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666105486] [2021-05-03 14:06:07,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:07,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:07,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:07,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:07,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:06:07,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196312906] [2021-05-03 14:06:07,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:06:07,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:07,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:06:07,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:06:07,772 INFO L87 Difference]: Start difference. First operand 506 states and 1464 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:07,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:07,835 INFO L93 Difference]: Finished difference Result 683 states and 1838 transitions. [2021-05-03 14:06:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:06:07,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:07,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:07,836 INFO L225 Difference]: With dead ends: 683 [2021-05-03 14:06:07,836 INFO L226 Difference]: Without dead ends: 671 [2021-05-03 14:06:07,836 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:07,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-05-03 14:06:07,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 504. [2021-05-03 14:06:07,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.9025844930417497) internal successors, (1460), 503 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:07,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1460 transitions. [2021-05-03 14:06:07,841 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1460 transitions. Word has length 18 [2021-05-03 14:06:07,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:07,841 INFO L480 AbstractCegarLoop]: Abstraction has 504 states and 1460 transitions. [2021-05-03 14:06:07,841 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) [2021-05-03 14:06:07,841 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1460 transitions. [2021-05-03 14:06:07,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:06:07,842 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:07,842 INFO L551 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:08,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1800,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:08,042 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:08,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:08,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1335371918, now seen corresponding path program 164 times [2021-05-03 14:06:08,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:08,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441447727] [2021-05-03 14:06:08,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:08,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441447727] [2021-05-03 14:06:08,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105409116] [2021-05-03 14:06:08,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:08,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:08,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:08,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:06:08,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:08,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:08,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:06:08,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41871523] [2021-05-03 14:06:08,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:06:08,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:08,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:06:08,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:06:08,148 INFO L87 Difference]: Start difference. First operand 504 states and 1460 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:08,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:08,295 INFO L93 Difference]: Finished difference Result 652 states and 1786 transitions. [2021-05-03 14:06:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:06:08,296 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:06:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:08,297 INFO L225 Difference]: With dead ends: 652 [2021-05-03 14:06:08,297 INFO L226 Difference]: Without dead ends: 652 [2021-05-03 14:06:08,297 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:08,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-05-03 14:06:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 525. [2021-05-03 14:06:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.895038167938931) internal successors, (1517), 524 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1517 transitions. [2021-05-03 14:06:08,302 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1517 transitions. Word has length 18 [2021-05-03 14:06:08,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:08,302 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 1517 transitions. [2021-05-03 14:06:08,302 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) [2021-05-03 14:06:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1517 transitions. [2021-05-03 14:06:08,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:08,303 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:08,303 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:08,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1801 [2021-05-03 14:06:08,503 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:08,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:08,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1154319608, now seen corresponding path program 165 times [2021-05-03 14:06:08,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:08,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765593207] [2021-05-03 14:06:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:08,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765593207] [2021-05-03 14:06:08,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601085295] [2021-05-03 14:06:08,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:08,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:06:08,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:08,672 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:08,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:08,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:08,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:06:09,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:09,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:09,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:06:09,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:06:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:09,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:09,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:06:09,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358812270] [2021-05-03 14:06:09,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:06:09,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:09,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:06:09,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:09,132 INFO L87 Difference]: Start difference. First operand 525 states and 1517 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:09,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:09,517 INFO L93 Difference]: Finished difference Result 604 states and 1671 transitions. [2021-05-03 14:06:09,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:06:09,517 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:09,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:09,518 INFO L225 Difference]: With dead ends: 604 [2021-05-03 14:06:09,518 INFO L226 Difference]: Without dead ends: 571 [2021-05-03 14:06:09,518 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 456.2ms TimeCoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:06:09,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-05-03 14:06:09,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 540. [2021-05-03 14:06:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.8923933209647497) internal successors, (1559), 539 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1559 transitions. [2021-05-03 14:06:09,523 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1559 transitions. Word has length 19 [2021-05-03 14:06:09,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:09,523 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1559 transitions. [2021-05-03 14:06:09,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:09,523 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1559 transitions. [2021-05-03 14:06:09,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:09,524 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:09,524 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:09,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1802,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:09,724 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:09,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1640517070, now seen corresponding path program 166 times [2021-05-03 14:06:09,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:09,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163440301] [2021-05-03 14:06:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:09,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163440301] [2021-05-03 14:06:09,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008439872] [2021-05-03 14:06:09,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:09,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:09,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:09,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:09,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:10,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:10,128 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 [2021-05-03 14:06:10,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:10,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:10,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:06:10,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:06:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:10,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:10,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:06:10,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654914485] [2021-05-03 14:06:10,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:06:10,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:10,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:06:10,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:10,233 INFO L87 Difference]: Start difference. First operand 540 states and 1559 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:10,559 INFO L93 Difference]: Finished difference Result 625 states and 1734 transitions. [2021-05-03 14:06:10,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:06:10,559 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:10,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:10,560 INFO L225 Difference]: With dead ends: 625 [2021-05-03 14:06:10,560 INFO L226 Difference]: Without dead ends: 609 [2021-05-03 14:06:10,560 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:06:10,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-05-03 14:06:10,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 556. [2021-05-03 14:06:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.908108108108108) internal successors, (1614), 555 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1614 transitions. [2021-05-03 14:06:10,566 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1614 transitions. Word has length 19 [2021-05-03 14:06:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:10,566 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1614 transitions. [2021-05-03 14:06:10,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:10,566 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1614 transitions. [2021-05-03 14:06:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:10,567 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:10,567 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:10,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1900 [2021-05-03 14:06:10,767 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:10,767 INFO L82 PathProgramCache]: Analyzing trace with hash -781642540, now seen corresponding path program 167 times [2021-05-03 14:06:10,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:10,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879600622] [2021-05-03 14:06:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:10,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879600622] [2021-05-03 14:06:10,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580069916] [2021-05-03 14:06:10,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:10,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:06:10,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:10,874 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:10,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:11,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:11,151 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 [2021-05-03 14:06:11,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:11,383 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:11,384 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:11,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:11,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:11,516 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:11,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:11,517 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:11,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:11,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:06:11,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120659032] [2021-05-03 14:06:11,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:06:11,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:11,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:06:11,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:11,560 INFO L87 Difference]: Start difference. First operand 556 states and 1614 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:11,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:11,949 INFO L93 Difference]: Finished difference Result 644 states and 1778 transitions. [2021-05-03 14:06:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:06:11,949 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:11,950 INFO L225 Difference]: With dead ends: 644 [2021-05-03 14:06:11,950 INFO L226 Difference]: Without dead ends: 634 [2021-05-03 14:06:11,950 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 310.6ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:06:11,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-05-03 14:06:11,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 556. [2021-05-03 14:06:11,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.908108108108108) internal successors, (1614), 555 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:11,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1614 transitions. [2021-05-03 14:06:11,958 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1614 transitions. Word has length 19 [2021-05-03 14:06:11,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:11,958 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1614 transitions. [2021-05-03 14:06:11,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:11,958 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1614 transitions. [2021-05-03 14:06:11,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:11,959 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:11,959 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:12,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1962,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:12,180 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:12,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:12,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1146496824, now seen corresponding path program 168 times [2021-05-03 14:06:12,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:12,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432574476] [2021-05-03 14:06:12,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:12,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432574476] [2021-05-03 14:06:12,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530890601] [2021-05-03 14:06:12,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:12,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:06:12,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:12,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:12,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:12,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:12,569 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 [2021-05-03 14:06:12,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:12,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:12,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:06:12,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:06:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:12,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:12,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:06:12,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249738364] [2021-05-03 14:06:12,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:06:12,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:12,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:06:12,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:12,658 INFO L87 Difference]: Start difference. First operand 556 states and 1614 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:12,962 INFO L93 Difference]: Finished difference Result 654 states and 1848 transitions. [2021-05-03 14:06:12,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:06:12,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:12,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:12,963 INFO L225 Difference]: With dead ends: 654 [2021-05-03 14:06:12,963 INFO L226 Difference]: Without dead ends: 638 [2021-05-03 14:06:12,963 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 300.4ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:06:12,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-05-03 14:06:12,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 585. [2021-05-03 14:06:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.9366438356164384) internal successors, (1715), 584 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:12,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1715 transitions. [2021-05-03 14:06:12,969 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1715 transitions. Word has length 19 [2021-05-03 14:06:12,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:12,969 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 1715 transitions. [2021-05-03 14:06:12,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:12,969 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1715 transitions. [2021-05-03 14:06:12,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:12,970 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:12,970 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:13,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2080 [2021-05-03 14:06:13,171 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:13,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:13,171 INFO L82 PathProgramCache]: Analyzing trace with hash -287622294, now seen corresponding path program 169 times [2021-05-03 14:06:13,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:13,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113420944] [2021-05-03 14:06:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:13,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113420944] [2021-05-03 14:06:13,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904369755] [2021-05-03 14:06:13,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:13,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:13,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:13,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:13,546 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 [2021-05-03 14:06:13,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:13,821 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:13,822 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:13,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:13,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:13,927 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:13,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:13,928 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:13,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:13,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:06:13,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154619501] [2021-05-03 14:06:13,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:06:13,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:13,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:06:13,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:13,959 INFO L87 Difference]: Start difference. First operand 585 states and 1715 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:14,430 INFO L93 Difference]: Finished difference Result 690 states and 1918 transitions. [2021-05-03 14:06:14,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:06:14,430 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:14,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:14,431 INFO L225 Difference]: With dead ends: 690 [2021-05-03 14:06:14,431 INFO L226 Difference]: Without dead ends: 671 [2021-05-03 14:06:14,431 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 361.9ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:06:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-05-03 14:06:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 583. [2021-05-03 14:06:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.929553264604811) internal successors, (1705), 582 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1705 transitions. [2021-05-03 14:06:14,437 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1705 transitions. Word has length 19 [2021-05-03 14:06:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:14,437 INFO L480 AbstractCegarLoop]: Abstraction has 583 states and 1705 transitions. [2021-05-03 14:06:14,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:14,437 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1705 transitions. [2021-05-03 14:06:14,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:14,438 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:14,438 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:14,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2128,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:14,638 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:14,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:14,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1422991014, now seen corresponding path program 170 times [2021-05-03 14:06:14,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:14,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359213832] [2021-05-03 14:06:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:14,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359213832] [2021-05-03 14:06:14,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902862148] [2021-05-03 14:06:14,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:14,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:14,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:14,762 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:14,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:15,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:15,046 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 [2021-05-03 14:06:15,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:15,278 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:15,278 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:15,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:15,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:15,412 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:15,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:15,413 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:15,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:15,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:06:15,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779971521] [2021-05-03 14:06:15,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:06:15,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:15,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:06:15,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:15,453 INFO L87 Difference]: Start difference. First operand 583 states and 1705 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:15,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:15,879 INFO L93 Difference]: Finished difference Result 643 states and 1827 transitions. [2021-05-03 14:06:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:06:15,879 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:15,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:15,880 INFO L225 Difference]: With dead ends: 643 [2021-05-03 14:06:15,880 INFO L226 Difference]: Without dead ends: 633 [2021-05-03 14:06:15,880 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:06:15,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-05-03 14:06:15,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 585. [2021-05-03 14:06:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.9297945205479454) internal successors, (1711), 584 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:15,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1711 transitions. [2021-05-03 14:06:15,886 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1711 transitions. Word has length 19 [2021-05-03 14:06:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:15,886 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 1711 transitions. [2021-05-03 14:06:15,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1711 transitions. [2021-05-03 14:06:15,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:15,887 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:15,887 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:16,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2225 [2021-05-03 14:06:16,087 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:16,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:16,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1095619830, now seen corresponding path program 171 times [2021-05-03 14:06:16,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:16,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843820544] [2021-05-03 14:06:16,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:06:16,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843820544] [2021-05-03 14:06:16,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117995881] [2021-05-03 14:06:16,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:16,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:06:16,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:16,193 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:16,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:16,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:16,467 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 [2021-05-03 14:06:16,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:16,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:16,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:06:16,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:06:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:16,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:16,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-05-03 14:06:16,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596506723] [2021-05-03 14:06:16,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:06:16,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:16,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:06:16,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:06:16,606 INFO L87 Difference]: Start difference. First operand 585 states and 1711 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:16,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:16,829 INFO L93 Difference]: Finished difference Result 619 states and 1761 transitions. [2021-05-03 14:06:16,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:06:16,829 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:16,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:16,830 INFO L225 Difference]: With dead ends: 619 [2021-05-03 14:06:16,830 INFO L226 Difference]: Without dead ends: 601 [2021-05-03 14:06:16,830 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 316.1ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:06:16,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-05-03 14:06:16,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 585. [2021-05-03 14:06:16,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.9263698630136985) internal successors, (1709), 584 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:16,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1709 transitions. [2021-05-03 14:06:16,836 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1709 transitions. Word has length 19 [2021-05-03 14:06:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:16,836 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 1709 transitions. [2021-05-03 14:06:16,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:16,836 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1709 transitions. [2021-05-03 14:06:16,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:16,837 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:16,837 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:17,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2316 [2021-05-03 14:06:17,038 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:17,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:17,038 INFO L82 PathProgramCache]: Analyzing trace with hash -980106122, now seen corresponding path program 172 times [2021-05-03 14:06:17,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:17,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476917025] [2021-05-03 14:06:17,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:17,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476917025] [2021-05-03 14:06:17,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795460759] [2021-05-03 14:06:17,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:17,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:17,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:17,157 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:17,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:17,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:17,418 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 [2021-05-03 14:06:17,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:17,643 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:17,643 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:17,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:17,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:17,836 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:17,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:17,837 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:17,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:17,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:06:17,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726300102] [2021-05-03 14:06:17,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:06:17,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:17,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:06:17,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:17,867 INFO L87 Difference]: Start difference. First operand 585 states and 1709 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:18,346 INFO L93 Difference]: Finished difference Result 693 states and 1917 transitions. [2021-05-03 14:06:18,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:06:18,346 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:18,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:18,347 INFO L225 Difference]: With dead ends: 693 [2021-05-03 14:06:18,347 INFO L226 Difference]: Without dead ends: 683 [2021-05-03 14:06:18,347 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:06:18,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-05-03 14:06:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 588. [2021-05-03 14:06:18,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.9165247018739353) internal successors, (1712), 587 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1712 transitions. [2021-05-03 14:06:18,353 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1712 transitions. Word has length 19 [2021-05-03 14:06:18,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:18,353 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1712 transitions. [2021-05-03 14:06:18,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:18,353 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1712 transitions. [2021-05-03 14:06:18,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:18,354 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:18,354 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:18,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2393,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:18,554 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:18,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1283228914, now seen corresponding path program 173 times [2021-05-03 14:06:18,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:18,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119917467] [2021-05-03 14:06:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:18,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119917467] [2021-05-03 14:06:18,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401587729] [2021-05-03 14:06:18,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:18,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:06:18,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:18,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:18,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:18,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:18,938 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 [2021-05-03 14:06:19,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:19,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:19,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:06:19,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:06:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:19,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:19,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:06:19,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450606513] [2021-05-03 14:06:19,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:06:19,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:19,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:06:19,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:19,061 INFO L87 Difference]: Start difference. First operand 588 states and 1712 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:19,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:19,359 INFO L93 Difference]: Finished difference Result 698 states and 1984 transitions. [2021-05-03 14:06:19,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:06:19,359 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:19,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:19,360 INFO L225 Difference]: With dead ends: 698 [2021-05-03 14:06:19,360 INFO L226 Difference]: Without dead ends: 680 [2021-05-03 14:06:19,360 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 298.6ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:06:19,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-05-03 14:06:19,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 625. [2021-05-03 14:06:19,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.948717948717949) internal successors, (1840), 624 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:19,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1840 transitions. [2021-05-03 14:06:19,366 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1840 transitions. Word has length 19 [2021-05-03 14:06:19,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:19,366 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1840 transitions. [2021-05-03 14:06:19,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1840 transitions. [2021-05-03 14:06:19,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:19,367 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:19,367 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:19,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2527 [2021-05-03 14:06:19,568 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:19,568 INFO L82 PathProgramCache]: Analyzing trace with hash 2142103444, now seen corresponding path program 174 times [2021-05-03 14:06:19,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:19,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426094419] [2021-05-03 14:06:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:19,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426094419] [2021-05-03 14:06:19,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158698860] [2021-05-03 14:06:19,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:19,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:06:19,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:19,674 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:19,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:19,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:19,945 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 [2021-05-03 14:06:20,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:20,167 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:20,168 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:20,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:20,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:20,301 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:20,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:20,302 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:20,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:20,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:06:20,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562243522] [2021-05-03 14:06:20,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:06:20,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:20,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:06:20,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:20,333 INFO L87 Difference]: Start difference. First operand 625 states and 1840 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:20,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:20,979 INFO L93 Difference]: Finished difference Result 768 states and 2131 transitions. [2021-05-03 14:06:20,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:06:20,979 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:20,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:20,980 INFO L225 Difference]: With dead ends: 768 [2021-05-03 14:06:20,980 INFO L226 Difference]: Without dead ends: 742 [2021-05-03 14:06:20,980 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 482.6ms TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:06:20,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-05-03 14:06:20,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 627. [2021-05-03 14:06:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.9472843450479234) internal successors, (1845), 626 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:20,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1845 transitions. [2021-05-03 14:06:20,986 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1845 transitions. Word has length 19 [2021-05-03 14:06:20,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:20,986 INFO L480 AbstractCegarLoop]: Abstraction has 627 states and 1845 transitions. [2021-05-03 14:06:20,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:20,986 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1845 transitions. [2021-05-03 14:06:20,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:20,987 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:20,987 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:21,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2595 [2021-05-03 14:06:21,187 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:21,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:21,188 INFO L82 PathProgramCache]: Analyzing trace with hash -442250544, now seen corresponding path program 175 times [2021-05-03 14:06:21,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:21,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833461269] [2021-05-03 14:06:21,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:21,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833461269] [2021-05-03 14:06:21,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493846471] [2021-05-03 14:06:21,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:21,308 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:21,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:21,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:21,583 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 [2021-05-03 14:06:21,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:21,859 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:21,860 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:21,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:22,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:22,032 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:22,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:22,032 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:22,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:22,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:06:22,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984582791] [2021-05-03 14:06:22,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:06:22,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:22,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:06:22,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:22,064 INFO L87 Difference]: Start difference. First operand 627 states and 1845 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:22,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:22,787 INFO L93 Difference]: Finished difference Result 816 states and 2235 transitions. [2021-05-03 14:06:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:06:22,787 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:22,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:22,789 INFO L225 Difference]: With dead ends: 816 [2021-05-03 14:06:22,789 INFO L226 Difference]: Without dead ends: 783 [2021-05-03 14:06:22,789 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 514.2ms TimeCoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:06:22,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-05-03 14:06:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 619. [2021-05-03 14:06:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.9352750809061487) internal successors, (1814), 618 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1814 transitions. [2021-05-03 14:06:22,795 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1814 transitions. Word has length 19 [2021-05-03 14:06:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:22,795 INFO L480 AbstractCegarLoop]: Abstraction has 619 states and 1814 transitions. [2021-05-03 14:06:22,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1814 transitions. [2021-05-03 14:06:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:22,796 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:22,796 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:22,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2707,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:22,997 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:22,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:22,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1047154452, now seen corresponding path program 176 times [2021-05-03 14:06:22,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:22,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017103986] [2021-05-03 14:06:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:23,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017103986] [2021-05-03 14:06:23,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614524049] [2021-05-03 14:06:23,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:23,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:23,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:23,143 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:23,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:23,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:23,427 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 [2021-05-03 14:06:23,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:23,729 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:23,729 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:23,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:23,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:23,839 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:23,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:23,840 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:23,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:23,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:06:23,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555047704] [2021-05-03 14:06:23,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:06:23,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:23,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:06:23,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:23,877 INFO L87 Difference]: Start difference. First operand 619 states and 1814 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:24,328 INFO L93 Difference]: Finished difference Result 731 states and 2045 transitions. [2021-05-03 14:06:24,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:06:24,329 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:24,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:24,329 INFO L225 Difference]: With dead ends: 731 [2021-05-03 14:06:24,330 INFO L226 Difference]: Without dead ends: 721 [2021-05-03 14:06:24,330 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 509.2ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:06:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-05-03 14:06:24,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 621. [2021-05-03 14:06:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.935483870967742) internal successors, (1820), 620 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:24,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1820 transitions. [2021-05-03 14:06:24,335 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1820 transitions. Word has length 19 [2021-05-03 14:06:24,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:24,335 INFO L480 AbstractCegarLoop]: Abstraction has 621 states and 1820 transitions. [2021-05-03 14:06:24,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:24,336 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1820 transitions. [2021-05-03 14:06:24,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:24,336 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:24,336 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:24,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2861 [2021-05-03 14:06:24,537 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:24,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:24,537 INFO L82 PathProgramCache]: Analyzing trace with hash -385947354, now seen corresponding path program 177 times [2021-05-03 14:06:24,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:24,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319556532] [2021-05-03 14:06:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:06:24,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319556532] [2021-05-03 14:06:24,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034185772] [2021-05-03 14:06:24,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:24,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:06:24,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:24,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:24,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:24,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:24,909 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 [2021-05-03 14:06:25,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:25,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:25,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:06:25,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:06:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:25,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:25,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-05-03 14:06:25,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260333036] [2021-05-03 14:06:25,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:06:25,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:25,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:06:25,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:06:25,010 INFO L87 Difference]: Start difference. First operand 621 states and 1820 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:25,274 INFO L93 Difference]: Finished difference Result 649 states and 1861 transitions. [2021-05-03 14:06:25,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:06:25,275 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:25,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:25,275 INFO L225 Difference]: With dead ends: 649 [2021-05-03 14:06:25,275 INFO L226 Difference]: Without dead ends: 631 [2021-05-03 14:06:25,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 308.8ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:06:25,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-05-03 14:06:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 621. [2021-05-03 14:06:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.9338709677419357) internal successors, (1819), 620 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1819 transitions. [2021-05-03 14:06:25,288 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1819 transitions. Word has length 19 [2021-05-03 14:06:25,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:25,288 INFO L480 AbstractCegarLoop]: Abstraction has 621 states and 1819 transitions. [2021-05-03 14:06:25,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1819 transitions. [2021-05-03 14:06:25,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:25,289 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:25,289 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:25,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2966,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:25,489 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:25,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:25,490 INFO L82 PathProgramCache]: Analyzing trace with hash -434412732, now seen corresponding path program 178 times [2021-05-03 14:06:25,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:25,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208337742] [2021-05-03 14:06:25,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:25,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208337742] [2021-05-03 14:06:25,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613366183] [2021-05-03 14:06:25,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:25,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:25,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:25,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:25,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:25,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:25,892 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 [2021-05-03 14:06:25,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:26,129 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:26,130 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:26,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:26,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:26,298 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:26,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:26,299 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:26,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:26,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:06:26,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292881297] [2021-05-03 14:06:26,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:06:26,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:26,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:06:26,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:26,330 INFO L87 Difference]: Start difference. First operand 621 states and 1819 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:26,985 INFO L93 Difference]: Finished difference Result 789 states and 2195 transitions. [2021-05-03 14:06:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:06:26,985 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:26,986 INFO L225 Difference]: With dead ends: 789 [2021-05-03 14:06:26,986 INFO L226 Difference]: Without dead ends: 779 [2021-05-03 14:06:26,986 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 534.5ms TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:06:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-05-03 14:06:26,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 622. [2021-05-03 14:06:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.9355877616747184) internal successors, (1823), 621 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:26,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1823 transitions. [2021-05-03 14:06:26,992 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1823 transitions. Word has length 19 [2021-05-03 14:06:26,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:26,992 INFO L480 AbstractCegarLoop]: Abstraction has 622 states and 1823 transitions. [2021-05-03 14:06:26,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:26,993 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1823 transitions. [2021-05-03 14:06:26,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:26,994 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:26,994 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:27,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3020 [2021-05-03 14:06:27,215 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:27,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:27,215 INFO L82 PathProgramCache]: Analyzing trace with hash -704684536, now seen corresponding path program 179 times [2021-05-03 14:06:27,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:27,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67886759] [2021-05-03 14:06:27,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:27,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67886759] [2021-05-03 14:06:27,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167840221] [2021-05-03 14:06:27,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:27,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:06:27,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:27,322 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:27,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:27,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:27,607 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 [2021-05-03 14:06:27,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:27,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:27,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:06:27,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:06:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:27,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:27,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:06:27,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248318721] [2021-05-03 14:06:27,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:06:27,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:27,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:06:27,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:27,725 INFO L87 Difference]: Start difference. First operand 622 states and 1823 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:28,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:28,123 INFO L93 Difference]: Finished difference Result 716 states and 2072 transitions. [2021-05-03 14:06:28,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:06:28,124 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:28,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:28,125 INFO L225 Difference]: With dead ends: 716 [2021-05-03 14:06:28,125 INFO L226 Difference]: Without dead ends: 700 [2021-05-03 14:06:28,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 306.5ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:06:28,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-05-03 14:06:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 661. [2021-05-03 14:06:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.9681818181818183) internal successors, (1959), 660 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:28,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1959 transitions. [2021-05-03 14:06:28,135 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1959 transitions. Word has length 19 [2021-05-03 14:06:28,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:28,135 INFO L480 AbstractCegarLoop]: Abstraction has 661 states and 1959 transitions. [2021-05-03 14:06:28,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:28,135 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1959 transitions. [2021-05-03 14:06:28,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:28,136 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:28,136 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:28,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3160 [2021-05-03 14:06:28,358 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:28,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:28,358 INFO L82 PathProgramCache]: Analyzing trace with hash 154189994, now seen corresponding path program 180 times [2021-05-03 14:06:28,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:28,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593510628] [2021-05-03 14:06:28,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:28,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593510628] [2021-05-03 14:06:28,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046000688] [2021-05-03 14:06:28,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:28,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:06:28,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:28,468 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:28,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:28,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:28,764 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 [2021-05-03 14:06:28,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:29,023 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:29,023 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:29,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:29,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:29,113 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:29,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:29,114 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:29,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:29,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:06:29,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17246919] [2021-05-03 14:06:29,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:06:29,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:29,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:06:29,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:29,146 INFO L87 Difference]: Start difference. First operand 661 states and 1959 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:29,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:29,963 INFO L93 Difference]: Finished difference Result 807 states and 2279 transitions. [2021-05-03 14:06:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 14:06:29,963 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:29,964 INFO L225 Difference]: With dead ends: 807 [2021-05-03 14:06:29,964 INFO L226 Difference]: Without dead ends: 781 [2021-05-03 14:06:29,965 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 557.4ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 14:06:29,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-05-03 14:06:29,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 667. [2021-05-03 14:06:29,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.9684684684684686) internal successors, (1977), 666 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:29,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1977 transitions. [2021-05-03 14:06:29,971 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1977 transitions. Word has length 19 [2021-05-03 14:06:29,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:29,971 INFO L480 AbstractCegarLoop]: Abstraction has 667 states and 1977 transitions. [2021-05-03 14:06:29,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:29,971 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1977 transitions. [2021-05-03 14:06:29,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:29,972 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:29,972 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:30,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3234,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:30,172 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:30,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:30,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1864803302, now seen corresponding path program 181 times [2021-05-03 14:06:30,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:30,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838349614] [2021-05-03 14:06:30,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:30,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838349614] [2021-05-03 14:06:30,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536456109] [2021-05-03 14:06:30,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:30,283 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:30,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:30,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:30,560 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 [2021-05-03 14:06:30,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:30,798 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:30,798 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:30,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:30,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:30,903 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:30,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:30,903 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:30,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:30,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:06:30,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321223150] [2021-05-03 14:06:30,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:06:30,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:30,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:06:30,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:30,934 INFO L87 Difference]: Start difference. First operand 667 states and 1977 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:31,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:31,395 INFO L93 Difference]: Finished difference Result 766 states and 2183 transitions. [2021-05-03 14:06:31,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:06:31,395 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:31,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:31,396 INFO L225 Difference]: With dead ends: 766 [2021-05-03 14:06:31,396 INFO L226 Difference]: Without dead ends: 756 [2021-05-03 14:06:31,397 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 471.9ms TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 14:06:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-05-03 14:06:31,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 675. [2021-05-03 14:06:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 2.970326409495549) internal successors, (2002), 674 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:31,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 2002 transitions. [2021-05-03 14:06:31,403 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 2002 transitions. Word has length 19 [2021-05-03 14:06:31,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:31,403 INFO L480 AbstractCegarLoop]: Abstraction has 675 states and 2002 transitions. [2021-05-03 14:06:31,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:31,403 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 2002 transitions. [2021-05-03 14:06:31,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:31,404 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:31,404 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:31,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:31,605 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:31,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:31,605 INFO L82 PathProgramCache]: Analyzing trace with hash -940758998, now seen corresponding path program 182 times [2021-05-03 14:06:31,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:31,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866957504] [2021-05-03 14:06:31,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:31,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866957504] [2021-05-03 14:06:31,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797435366] [2021-05-03 14:06:31,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:31,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:31,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:31,722 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:31,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:32,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:32,012 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 [2021-05-03 14:06:32,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:32,231 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:32,231 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:32,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:32,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:32,316 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:32,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:32,316 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:32,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:32,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:06:32,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719778215] [2021-05-03 14:06:32,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:06:32,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:32,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:06:32,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:32,348 INFO L87 Difference]: Start difference. First operand 675 states and 2002 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:33,022 INFO L93 Difference]: Finished difference Result 837 states and 2353 transitions. [2021-05-03 14:06:33,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:06:33,022 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:33,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:33,024 INFO L225 Difference]: With dead ends: 837 [2021-05-03 14:06:33,024 INFO L226 Difference]: Without dead ends: 808 [2021-05-03 14:06:33,024 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 622.6ms TimeCoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 14:06:33,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-05-03 14:06:33,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 670. [2021-05-03 14:06:33,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 2.968609865470852) internal successors, (1986), 669 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1986 transitions. [2021-05-03 14:06:33,031 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1986 transitions. Word has length 19 [2021-05-03 14:06:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:33,031 INFO L480 AbstractCegarLoop]: Abstraction has 670 states and 1986 transitions. [2021-05-03 14:06:33,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1986 transitions. [2021-05-03 14:06:33,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:33,031 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:33,031 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:33,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:33,232 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:33,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:33,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2013844378, now seen corresponding path program 183 times [2021-05-03 14:06:33,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:33,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403090933] [2021-05-03 14:06:33,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:33,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403090933] [2021-05-03 14:06:33,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254855942] [2021-05-03 14:06:33,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:33,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:06:33,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:33,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:33,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:33,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:33,638 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 [2021-05-03 14:06:33,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:33,911 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:33,912 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:33,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:33,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:33,995 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:33,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:33,996 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:34,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:34,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:06:34,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727188069] [2021-05-03 14:06:34,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:06:34,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:34,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:06:34,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:34,028 INFO L87 Difference]: Start difference. First operand 670 states and 1986 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:34,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:34,554 INFO L93 Difference]: Finished difference Result 781 states and 2228 transitions. [2021-05-03 14:06:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:06:34,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:34,555 INFO L225 Difference]: With dead ends: 781 [2021-05-03 14:06:34,555 INFO L226 Difference]: Without dead ends: 771 [2021-05-03 14:06:34,555 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 554.5ms TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:06:34,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-05-03 14:06:34,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 671. [2021-05-03 14:06:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.9686567164179105) internal successors, (1989), 670 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1989 transitions. [2021-05-03 14:06:34,563 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1989 transitions. Word has length 19 [2021-05-03 14:06:34,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:34,563 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1989 transitions. [2021-05-03 14:06:34,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1989 transitions. [2021-05-03 14:06:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:34,564 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:34,564 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:34,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3561 [2021-05-03 14:06:34,770 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:34,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:34,771 INFO L82 PathProgramCache]: Analyzing trace with hash -806481870, now seen corresponding path program 184 times [2021-05-03 14:06:34,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:34,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479181119] [2021-05-03 14:06:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:34,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479181119] [2021-05-03 14:06:34,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84736204] [2021-05-03 14:06:34,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:06:34,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:34,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:34,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:34,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:35,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:35,173 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 [2021-05-03 14:06:35,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:35,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:35,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:06:35,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:06:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:35,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:35,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:06:35,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677454810] [2021-05-03 14:06:35,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:06:35,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:35,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:06:35,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:35,312 INFO L87 Difference]: Start difference. First operand 671 states and 1989 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:35,642 INFO L93 Difference]: Finished difference Result 702 states and 2034 transitions. [2021-05-03 14:06:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:06:35,642 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:35,644 INFO L225 Difference]: With dead ends: 702 [2021-05-03 14:06:35,644 INFO L226 Difference]: Without dead ends: 680 [2021-05-03 14:06:35,644 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 376.0ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:06:35,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-05-03 14:06:35,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 671. [2021-05-03 14:06:35,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.967164179104478) internal successors, (1988), 670 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1988 transitions. [2021-05-03 14:06:35,653 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1988 transitions. Word has length 19 [2021-05-03 14:06:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:35,653 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1988 transitions. [2021-05-03 14:06:35,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1988 transitions. [2021-05-03 14:06:35,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:35,654 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:35,654 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:35,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3679,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:35,873 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:35,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:35,873 INFO L82 PathProgramCache]: Analyzing trace with hash 153350736, now seen corresponding path program 185 times [2021-05-03 14:06:35,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:35,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211545186] [2021-05-03 14:06:35,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:35,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211545186] [2021-05-03 14:06:35,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720036820] [2021-05-03 14:06:35,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:35,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:06:35,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:35,981 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:35,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:36,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:36,254 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 [2021-05-03 14:06:36,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:36,479 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:36,479 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:36,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:36,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:36,607 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:36,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:36,608 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:36,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:36,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:06:36,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770479822] [2021-05-03 14:06:36,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:06:36,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:36,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:06:36,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:36,638 INFO L87 Difference]: Start difference. First operand 671 states and 1988 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:37,244 INFO L93 Difference]: Finished difference Result 827 states and 2298 transitions. [2021-05-03 14:06:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:06:37,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:37,246 INFO L225 Difference]: With dead ends: 827 [2021-05-03 14:06:37,246 INFO L226 Difference]: Without dead ends: 805 [2021-05-03 14:06:37,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 530.9ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 14:06:37,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-05-03 14:06:37,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 670. [2021-05-03 14:06:37,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 2.9626307922272046) internal successors, (1982), 669 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:37,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1982 transitions. [2021-05-03 14:06:37,254 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1982 transitions. Word has length 19 [2021-05-03 14:06:37,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:37,254 INFO L480 AbstractCegarLoop]: Abstraction has 670 states and 1982 transitions. [2021-05-03 14:06:37,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:37,254 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1982 transitions. [2021-05-03 14:06:37,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:37,255 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:37,255 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:37,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3756 [2021-05-03 14:06:37,476 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:37,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:37,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1642755732, now seen corresponding path program 186 times [2021-05-03 14:06:37,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:37,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546477829] [2021-05-03 14:06:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:37,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546477829] [2021-05-03 14:06:37,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915175488] [2021-05-03 14:06:37,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:37,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:06:37,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:37,603 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:37,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:37,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:37,877 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 [2021-05-03 14:06:38,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:38,159 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:38,160 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:38,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:38,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:38,264 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:38,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:38,265 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:38,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:38,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:06:38,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200400734] [2021-05-03 14:06:38,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:06:38,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:38,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:06:38,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:38,302 INFO L87 Difference]: Start difference. First operand 670 states and 1982 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:39,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:39,062 INFO L93 Difference]: Finished difference Result 855 states and 2368 transitions. [2021-05-03 14:06:39,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:06:39,063 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:39,064 INFO L225 Difference]: With dead ends: 855 [2021-05-03 14:06:39,064 INFO L226 Difference]: Without dead ends: 826 [2021-05-03 14:06:39,064 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 650.3ms TimeCoverageRelationStatistics Valid=231, Invalid=1491, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:06:39,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-05-03 14:06:39,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 662. [2021-05-03 14:06:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.9531013615733737) internal successors, (1952), 661 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:39,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1952 transitions. [2021-05-03 14:06:39,071 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1952 transitions. Word has length 19 [2021-05-03 14:06:39,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:39,071 INFO L480 AbstractCegarLoop]: Abstraction has 662 states and 1952 transitions. [2021-05-03 14:06:39,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:39,071 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1952 transitions. [2021-05-03 14:06:39,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:39,072 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:39,072 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:39,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3865,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:39,274 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:39,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:39,274 INFO L82 PathProgramCache]: Analyzing trace with hash 569670352, now seen corresponding path program 187 times [2021-05-03 14:06:39,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:39,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910784878] [2021-05-03 14:06:39,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:39,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:39,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910784878] [2021-05-03 14:06:39,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093986350] [2021-05-03 14:06:39,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:39,386 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:39,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:39,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:39,669 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 [2021-05-03 14:06:39,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:39,910 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:39,911 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:39,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:39,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:39,997 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:39,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:39,998 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:40,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:40,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:06:40,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459784237] [2021-05-03 14:06:40,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:06:40,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:40,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:06:40,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:40,029 INFO L87 Difference]: Start difference. First operand 662 states and 1952 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:40,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:40,507 INFO L93 Difference]: Finished difference Result 809 states and 2278 transitions. [2021-05-03 14:06:40,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:06:40,507 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:40,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:40,508 INFO L225 Difference]: With dead ends: 809 [2021-05-03 14:06:40,508 INFO L226 Difference]: Without dead ends: 799 [2021-05-03 14:06:40,508 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 552.3ms TimeCoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:06:40,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-05-03 14:06:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 666. [2021-05-03 14:06:40,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.948872180451128) internal successors, (1961), 665 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1961 transitions. [2021-05-03 14:06:40,515 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1961 transitions. Word has length 19 [2021-05-03 14:06:40,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:40,515 INFO L480 AbstractCegarLoop]: Abstraction has 666 states and 1961 transitions. [2021-05-03 14:06:40,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:40,515 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1961 transitions. [2021-05-03 14:06:40,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:40,516 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:40,516 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:40,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3971,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:40,716 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:40,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:40,716 INFO L82 PathProgramCache]: Analyzing trace with hash -697786826, now seen corresponding path program 188 times [2021-05-03 14:06:40,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:40,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720939101] [2021-05-03 14:06:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:40,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720939101] [2021-05-03 14:06:40,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096171975] [2021-05-03 14:06:40,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:40,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:40,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:40,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:40,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:41,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:41,141 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 [2021-05-03 14:06:41,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:41,375 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:41,376 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:41,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:41,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:41,509 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:41,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:41,510 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:41,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:41,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:06:41,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705909821] [2021-05-03 14:06:41,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:06:41,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:41,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:06:41,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:41,546 INFO L87 Difference]: Start difference. First operand 666 states and 1961 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:42,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:42,333 INFO L93 Difference]: Finished difference Result 905 states and 2517 transitions. [2021-05-03 14:06:42,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:06:42,333 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:42,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:42,334 INFO L225 Difference]: With dead ends: 905 [2021-05-03 14:06:42,335 INFO L226 Difference]: Without dead ends: 895 [2021-05-03 14:06:42,335 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 728.0ms TimeCoverageRelationStatistics Valid=241, Invalid=1651, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 14:06:42,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-05-03 14:06:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 667. [2021-05-03 14:06:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.951951951951952) internal successors, (1966), 666 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:42,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1966 transitions. [2021-05-03 14:06:42,342 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1966 transitions. Word has length 19 [2021-05-03 14:06:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:42,342 INFO L480 AbstractCegarLoop]: Abstraction has 667 states and 1966 transitions. [2021-05-03 14:06:42,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1966 transitions. [2021-05-03 14:06:42,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:42,343 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:42,343 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:42,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-05-03 14:06:42,543 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:42,543 INFO L82 PathProgramCache]: Analyzing trace with hash 2094507954, now seen corresponding path program 189 times [2021-05-03 14:06:42,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:42,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474763892] [2021-05-03 14:06:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:42,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474763892] [2021-05-03 14:06:42,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773601094] [2021-05-03 14:06:42,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:06:42,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:06:42,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:42,651 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:42,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:42,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:42,937 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 [2021-05-03 14:06:43,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:43,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:43,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:06:43,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:06:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:43,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:43,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:06:43,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226075278] [2021-05-03 14:06:43,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:06:43,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:43,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:06:43,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:43,037 INFO L87 Difference]: Start difference. First operand 667 states and 1966 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:43,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:43,396 INFO L93 Difference]: Finished difference Result 778 states and 2267 transitions. [2021-05-03 14:06:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:06:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:43,397 INFO L225 Difference]: With dead ends: 778 [2021-05-03 14:06:43,397 INFO L226 Difference]: Without dead ends: 760 [2021-05-03 14:06:43,397 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 307.4ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:06:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-05-03 14:06:43,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 721. [2021-05-03 14:06:43,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 2.9875) internal successors, (2151), 720 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:43,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2151 transitions. [2021-05-03 14:06:43,404 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2151 transitions. Word has length 19 [2021-05-03 14:06:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:43,404 INFO L480 AbstractCegarLoop]: Abstraction has 721 states and 2151 transitions. [2021-05-03 14:06:43,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:43,404 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2151 transitions. [2021-05-03 14:06:43,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:43,405 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:43,405 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:43,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4173,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:43,606 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:43,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:43,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1341584812, now seen corresponding path program 190 times [2021-05-03 14:06:43,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:43,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49700] [2021-05-03 14:06:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:43,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49700] [2021-05-03 14:06:43,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559347187] [2021-05-03 14:06:43,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:43,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:43,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:43,712 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:43,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:43,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:43,999 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 [2021-05-03 14:06:44,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:44,262 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:44,262 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:44,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:44,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:44,391 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:44,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:44,392 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:44,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:44,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:06:44,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38521319] [2021-05-03 14:06:44,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:06:44,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:44,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:06:44,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:44,424 INFO L87 Difference]: Start difference. First operand 721 states and 2151 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:45,372 INFO L93 Difference]: Finished difference Result 908 states and 2570 transitions. [2021-05-03 14:06:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 14:06:45,372 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:45,373 INFO L225 Difference]: With dead ends: 908 [2021-05-03 14:06:45,373 INFO L226 Difference]: Without dead ends: 875 [2021-05-03 14:06:45,373 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 686.5ms TimeCoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 14:06:45,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-05-03 14:06:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 729. [2021-05-03 14:06:45,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.993131868131868) internal successors, (2179), 728 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2179 transitions. [2021-05-03 14:06:45,381 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2179 transitions. Word has length 19 [2021-05-03 14:06:45,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:45,381 INFO L480 AbstractCegarLoop]: Abstraction has 729 states and 2179 transitions. [2021-05-03 14:06:45,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:45,381 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2179 transitions. [2021-05-03 14:06:45,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:45,382 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:45,382 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:45,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4231 [2021-05-03 14:06:45,582 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:45,583 INFO L82 PathProgramCache]: Analyzing trace with hash 369028496, now seen corresponding path program 191 times [2021-05-03 14:06:45,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:45,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401063024] [2021-05-03 14:06:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:45,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401063024] [2021-05-03 14:06:45,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930320951] [2021-05-03 14:06:45,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:45,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:06:45,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:45,701 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:45,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:46,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:46,003 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 [2021-05-03 14:06:46,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:46,252 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:46,253 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:46,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:46,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:46,363 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:46,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:46,363 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:46,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:46,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:06:46,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425473028] [2021-05-03 14:06:46,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:06:46,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:46,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:06:46,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:46,396 INFO L87 Difference]: Start difference. First operand 729 states and 2179 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:47,553 INFO L93 Difference]: Finished difference Result 1020 states and 2819 transitions. [2021-05-03 14:06:47,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 14:06:47,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:47,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:47,555 INFO L225 Difference]: With dead ends: 1020 [2021-05-03 14:06:47,555 INFO L226 Difference]: Without dead ends: 973 [2021-05-03 14:06:47,555 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 839.7ms TimeCoverageRelationStatistics Valid=333, Invalid=2217, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 14:06:47,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-05-03 14:06:47,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 738. [2021-05-03 14:06:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.983717774762551) internal successors, (2199), 737 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:47,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2199 transitions. [2021-05-03 14:06:47,563 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2199 transitions. Word has length 19 [2021-05-03 14:06:47,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:47,563 INFO L480 AbstractCegarLoop]: Abstraction has 738 states and 2199 transitions. [2021-05-03 14:06:47,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:47,563 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2199 transitions. [2021-05-03 14:06:47,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:47,564 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:47,564 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:47,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4333,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:47,764 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:47,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1858433492, now seen corresponding path program 192 times [2021-05-03 14:06:47,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:47,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291046184] [2021-05-03 14:06:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:47,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291046184] [2021-05-03 14:06:47,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220983817] [2021-05-03 14:06:47,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:47,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:06:47,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:47,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:47,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:48,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:48,180 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 [2021-05-03 14:06:48,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:48,539 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:48,539 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:48,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:48,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:48,656 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:48,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:48,657 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:48,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:48,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:06:48,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136132216] [2021-05-03 14:06:48,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:06:48,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:48,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:06:48,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:48,689 INFO L87 Difference]: Start difference. First operand 738 states and 2199 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:49,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:49,439 INFO L93 Difference]: Finished difference Result 871 states and 2475 transitions. [2021-05-03 14:06:49,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:06:49,439 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:49,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:49,441 INFO L225 Difference]: With dead ends: 871 [2021-05-03 14:06:49,441 INFO L226 Difference]: Without dead ends: 856 [2021-05-03 14:06:49,441 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 632.2ms TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:06:49,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-05-03 14:06:49,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 743. [2021-05-03 14:06:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.981132075471698) internal successors, (2212), 742 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2212 transitions. [2021-05-03 14:06:49,448 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2212 transitions. Word has length 19 [2021-05-03 14:06:49,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:49,449 INFO L480 AbstractCegarLoop]: Abstraction has 743 states and 2212 transitions. [2021-05-03 14:06:49,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2212 transitions. [2021-05-03 14:06:49,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:49,449 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:49,449 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:49,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4454,197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:49,650 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:49,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:49,650 INFO L82 PathProgramCache]: Analyzing trace with hash 785348112, now seen corresponding path program 193 times [2021-05-03 14:06:49,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:49,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659876228] [2021-05-03 14:06:49,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:49,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659876228] [2021-05-03 14:06:49,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640505734] [2021-05-03 14:06:49,762 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:49,781 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:49,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:50,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:50,080 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 [2021-05-03 14:06:50,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:50,301 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:50,301 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:50,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:50,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:50,552 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:50,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:50,553 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:50,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:50,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:06:50,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926035027] [2021-05-03 14:06:50,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:06:50,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:50,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:06:50,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:50,586 INFO L87 Difference]: Start difference. First operand 743 states and 2212 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:51,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:51,300 INFO L93 Difference]: Finished difference Result 917 states and 2588 transitions. [2021-05-03 14:06:51,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:06:51,300 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:51,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:51,302 INFO L225 Difference]: With dead ends: 917 [2021-05-03 14:06:51,302 INFO L226 Difference]: Without dead ends: 895 [2021-05-03 14:06:51,302 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 730.4ms TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:06:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-05-03 14:06:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 742. [2021-05-03 14:06:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.9851551956815117) internal successors, (2212), 741 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2212 transitions. [2021-05-03 14:06:51,309 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2212 transitions. Word has length 19 [2021-05-03 14:06:51,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:51,309 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 2212 transitions. [2021-05-03 14:06:51,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2212 transitions. [2021-05-03 14:06:51,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:51,310 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:51,310 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:51,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4622,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:51,511 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:51,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:51,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1879439700, now seen corresponding path program 194 times [2021-05-03 14:06:51,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:51,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806131968] [2021-05-03 14:06:51,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:51,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806131968] [2021-05-03 14:06:51,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815502785] [2021-05-03 14:06:51,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:51,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:51,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:51,643 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:51,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:51,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:51,946 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 [2021-05-03 14:06:52,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:52,186 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:52,186 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:52,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:52,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:52,279 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:52,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:52,280 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:52,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:52,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:06:52,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970655055] [2021-05-03 14:06:52,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:06:52,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:52,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:06:52,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:52,313 INFO L87 Difference]: Start difference. First operand 742 states and 2212 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:52,976 INFO L93 Difference]: Finished difference Result 882 states and 2522 transitions. [2021-05-03 14:06:52,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:06:52,976 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:52,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:52,977 INFO L225 Difference]: With dead ends: 882 [2021-05-03 14:06:52,977 INFO L226 Difference]: Without dead ends: 872 [2021-05-03 14:06:52,978 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 663.7ms TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 14:06:52,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-05-03 14:06:52,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 742. [2021-05-03 14:06:52,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.9851551956815117) internal successors, (2212), 741 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:52,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2212 transitions. [2021-05-03 14:06:52,985 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2212 transitions. Word has length 19 [2021-05-03 14:06:52,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:52,985 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 2212 transitions. [2021-05-03 14:06:52,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:52,985 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2212 transitions. [2021-05-03 14:06:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:52,986 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:52,986 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:53,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4782,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:53,186 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:53,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:53,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1973063432, now seen corresponding path program 195 times [2021-05-03 14:06:53,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:53,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139843680] [2021-05-03 14:06:53,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:53,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139843680] [2021-05-03 14:06:53,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914904550] [2021-05-03 14:06:53,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:53,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:06:53,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:53,306 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:53,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:53,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:53,615 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 [2021-05-03 14:06:53,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:53,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:53,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:06:53,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:06:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:53,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:53,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:06:53,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089284726] [2021-05-03 14:06:53,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:06:53,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:53,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:06:53,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:53,723 INFO L87 Difference]: Start difference. First operand 742 states and 2212 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:54,070 INFO L93 Difference]: Finished difference Result 781 states and 2273 transitions. [2021-05-03 14:06:54,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:06:54,071 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:54,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:54,072 INFO L225 Difference]: With dead ends: 781 [2021-05-03 14:06:54,072 INFO L226 Difference]: Without dead ends: 759 [2021-05-03 14:06:54,072 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 402.9ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:06:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-05-03 14:06:54,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 742. [2021-05-03 14:06:54,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.982456140350877) internal successors, (2210), 741 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2210 transitions. [2021-05-03 14:06:54,081 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2210 transitions. Word has length 19 [2021-05-03 14:06:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:54,081 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 2210 transitions. [2021-05-03 14:06:54,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2210 transitions. [2021-05-03 14:06:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:54,082 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:54,082 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:54,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4890 [2021-05-03 14:06:54,289 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:54,289 INFO L82 PathProgramCache]: Analyzing trace with hash 343011498, now seen corresponding path program 196 times [2021-05-03 14:06:54,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:54,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491336070] [2021-05-03 14:06:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:54,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491336070] [2021-05-03 14:06:54,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004519321] [2021-05-03 14:06:54,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:54,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:54,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:54,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:54,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:54,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:54,703 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 [2021-05-03 14:06:54,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:54,961 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:54,962 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:54,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:55,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:55,096 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:55,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:55,096 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:55,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:55,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:06:55,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295533717] [2021-05-03 14:06:55,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:06:55,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:55,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:06:55,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:55,128 INFO L87 Difference]: Start difference. First operand 742 states and 2210 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:56,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:56,071 INFO L93 Difference]: Finished difference Result 986 states and 2710 transitions. [2021-05-03 14:06:56,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 14:06:56,072 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:56,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:56,073 INFO L225 Difference]: With dead ends: 986 [2021-05-03 14:06:56,073 INFO L226 Difference]: Without dead ends: 945 [2021-05-03 14:06:56,074 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 797.3ms TimeCoverageRelationStatistics Valid=328, Invalid=2222, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 14:06:56,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-05-03 14:06:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 738. [2021-05-03 14:06:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.976933514246947) internal successors, (2194), 737 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:56,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2194 transitions. [2021-05-03 14:06:56,083 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2194 transitions. Word has length 19 [2021-05-03 14:06:56,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:56,083 INFO L480 AbstractCegarLoop]: Abstraction has 738 states and 2194 transitions. [2021-05-03 14:06:56,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:56,083 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2194 transitions. [2021-05-03 14:06:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:56,084 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:56,084 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:56,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4951,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:56,301 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:56,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:56,301 INFO L82 PathProgramCache]: Analyzing trace with hash -730073882, now seen corresponding path program 197 times [2021-05-03 14:06:56,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:56,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342015840] [2021-05-03 14:06:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:56,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342015840] [2021-05-03 14:06:56,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539598057] [2021-05-03 14:06:56,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:56,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:06:56,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:56,431 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:56,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:56,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:56,726 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 [2021-05-03 14:06:56,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:57,007 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:57,007 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:57,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:57,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:57,247 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:57,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:57,248 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:57,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:57,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:06:57,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227579143] [2021-05-03 14:06:57,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:06:57,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:57,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:06:57,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:57,292 INFO L87 Difference]: Start difference. First operand 738 states and 2194 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:58,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:58,310 INFO L93 Difference]: Finished difference Result 978 states and 2744 transitions. [2021-05-03 14:06:58,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:06:58,311 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:06:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:58,312 INFO L225 Difference]: With dead ends: 978 [2021-05-03 14:06:58,312 INFO L226 Difference]: Without dead ends: 947 [2021-05-03 14:06:58,312 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 869.0ms TimeCoverageRelationStatistics Valid=296, Invalid=1960, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 14:06:58,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-05-03 14:06:58,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 716. [2021-05-03 14:06:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.9762237762237764) internal successors, (2128), 715 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:58,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2128 transitions. [2021-05-03 14:06:58,320 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2128 transitions. Word has length 19 [2021-05-03 14:06:58,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:58,320 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 2128 transitions. [2021-05-03 14:06:58,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:58,320 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2128 transitions. [2021-05-03 14:06:58,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:06:58,321 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:58,321 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:58,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5087 [2021-05-03 14:06:58,522 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:58,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:58,522 INFO L82 PathProgramCache]: Analyzing trace with hash 364017706, now seen corresponding path program 198 times [2021-05-03 14:06:58,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:58,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806438104] [2021-05-03 14:06:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:58,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806438104] [2021-05-03 14:06:58,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304461821] [2021-05-03 14:06:58,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:58,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:06:58,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:58,653 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:06:58,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:59,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:59,037 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 [2021-05-03 14:06:59,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:59,262 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:06:59,262 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:06:59,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:06:59,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:06:59,346 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:06:59,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:06:59,347 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:06:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:59,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:59,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:06:59,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223256852] [2021-05-03 14:06:59,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:06:59,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:59,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:06:59,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:59,379 INFO L87 Difference]: Start difference. First operand 716 states and 2128 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:00,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:00,034 INFO L93 Difference]: Finished difference Result 934 states and 2662 transitions. [2021-05-03 14:07:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:00,035 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:00,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:00,036 INFO L225 Difference]: With dead ends: 934 [2021-05-03 14:07:00,036 INFO L226 Difference]: Without dead ends: 924 [2021-05-03 14:07:00,036 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 754.9ms TimeCoverageRelationStatistics Valid=229, Invalid=1493, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:07:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-05-03 14:07:00,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 719. [2021-05-03 14:07:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.9763231197771587) internal successors, (2137), 718 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2137 transitions. [2021-05-03 14:07:00,043 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2137 transitions. Word has length 19 [2021-05-03 14:07:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:00,044 INFO L480 AbstractCegarLoop]: Abstraction has 719 states and 2137 transitions. [2021-05-03 14:07:00,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:00,044 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2137 transitions. [2021-05-03 14:07:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:00,045 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:00,045 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:00,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5260,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:00,245 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:00,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:00,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1221778650, now seen corresponding path program 199 times [2021-05-03 14:07:00,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:00,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205658674] [2021-05-03 14:07:00,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:00,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205658674] [2021-05-03 14:07:00,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114357949] [2021-05-03 14:07:00,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:00,382 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:00,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:00,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:00,702 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 [2021-05-03 14:07:00,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:00,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:00,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:00,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:07:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:00,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:00,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:07:00,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572984756] [2021-05-03 14:07:00,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:07:00,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:00,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:07:00,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:00,802 INFO L87 Difference]: Start difference. First operand 719 states and 2137 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:01,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:01,197 INFO L93 Difference]: Finished difference Result 746 states and 2179 transitions. [2021-05-03 14:07:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:07:01,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:01,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:01,199 INFO L225 Difference]: With dead ends: 746 [2021-05-03 14:07:01,199 INFO L226 Difference]: Without dead ends: 728 [2021-05-03 14:07:01,199 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 379.7ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:01,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-05-03 14:07:01,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 719. [2021-05-03 14:07:01,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.9749303621169916) internal successors, (2136), 718 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:01,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2136 transitions. [2021-05-03 14:07:01,205 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2136 transitions. Word has length 19 [2021-05-03 14:07:01,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:01,205 INFO L480 AbstractCegarLoop]: Abstraction has 719 states and 2136 transitions. [2021-05-03 14:07:01,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:01,205 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2136 transitions. [2021-05-03 14:07:01,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:01,207 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:01,207 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:01,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5328,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:01,421 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:01,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:01,421 INFO L82 PathProgramCache]: Analyzing trace with hash -272449148, now seen corresponding path program 200 times [2021-05-03 14:07:01,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:01,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130217574] [2021-05-03 14:07:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:01,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130217574] [2021-05-03 14:07:01,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818106686] [2021-05-03 14:07:01,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:01,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:01,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:01,567 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:01,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:01,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:01,856 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 [2021-05-03 14:07:02,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:02,175 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:02,176 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:02,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:02,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:02,252 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:02,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:02,252 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:02,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:02,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:07:02,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029230214] [2021-05-03 14:07:02,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:07:02,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:02,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:07:02,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:02,284 INFO L87 Difference]: Start difference. First operand 719 states and 2136 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:03,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:03,189 INFO L93 Difference]: Finished difference Result 991 states and 2826 transitions. [2021-05-03 14:07:03,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:07:03,190 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:03,191 INFO L225 Difference]: With dead ends: 991 [2021-05-03 14:07:03,191 INFO L226 Difference]: Without dead ends: 981 [2021-05-03 14:07:03,191 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 855.1ms TimeCoverageRelationStatistics Valid=277, Invalid=1885, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 14:07:03,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-05-03 14:07:03,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 730. [2021-05-03 14:07:03,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 2.9753086419753085) internal successors, (2169), 729 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2169 transitions. [2021-05-03 14:07:03,199 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2169 transitions. Word has length 19 [2021-05-03 14:07:03,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:03,199 INFO L480 AbstractCegarLoop]: Abstraction has 730 states and 2169 transitions. [2021-05-03 14:07:03,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:03,199 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2169 transitions. [2021-05-03 14:07:03,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:03,200 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:03,200 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:03,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5377,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:03,400 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:03,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:03,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1324838072, now seen corresponding path program 201 times [2021-05-03 14:07:03,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:03,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512101797] [2021-05-03 14:07:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:03,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512101797] [2021-05-03 14:07:03,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157916398] [2021-05-03 14:07:03,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:03,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:07:03,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:03,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:03,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:03,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:03,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:07:03,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:03,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:03,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:03,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:07:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:03,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:03,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:07:03,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943476546] [2021-05-03 14:07:03,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:07:03,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:03,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:07:03,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:03,971 INFO L87 Difference]: Start difference. First operand 730 states and 2169 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:04,378 INFO L93 Difference]: Finished difference Result 865 states and 2545 transitions. [2021-05-03 14:07:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:07:04,378 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:04,380 INFO L225 Difference]: With dead ends: 865 [2021-05-03 14:07:04,380 INFO L226 Difference]: Without dead ends: 849 [2021-05-03 14:07:04,380 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-05-03 14:07:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 821. [2021-05-03 14:07:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.0) internal successors, (2460), 820 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:04,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2460 transitions. [2021-05-03 14:07:04,388 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2460 transitions. Word has length 19 [2021-05-03 14:07:04,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:04,388 INFO L480 AbstractCegarLoop]: Abstraction has 821 states and 2460 transitions. [2021-05-03 14:07:04,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:04,388 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2460 transitions. [2021-05-03 14:07:04,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:04,389 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:04,389 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:04,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5501,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:04,589 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:04,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:04,589 INFO L82 PathProgramCache]: Analyzing trace with hash -465963542, now seen corresponding path program 202 times [2021-05-03 14:07:04,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:04,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705937241] [2021-05-03 14:07:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:04,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705937241] [2021-05-03 14:07:04,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686345586] [2021-05-03 14:07:04,677 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 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 [2021-05-03 14:07:04,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:04,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:04,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:04,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:04,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:04,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:07:05,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:05,250 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:05,250 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:05,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:05,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:05,346 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:05,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:05,347 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:05,378 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:05,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:05,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:07:05,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077101522] [2021-05-03 14:07:05,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:07:05,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:05,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:07:05,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:05,379 INFO L87 Difference]: Start difference. First operand 821 states and 2460 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:06,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:06,481 INFO L93 Difference]: Finished difference Result 986 states and 2831 transitions. [2021-05-03 14:07:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 14:07:06,482 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:06,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:06,483 INFO L225 Difference]: With dead ends: 986 [2021-05-03 14:07:06,483 INFO L226 Difference]: Without dead ends: 955 [2021-05-03 14:07:06,483 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 729.8ms TimeCoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 14:07:06,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-05-03 14:07:06,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 825. [2021-05-03 14:07:06,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 3.003640776699029) internal successors, (2475), 824 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2475 transitions. [2021-05-03 14:07:06,493 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2475 transitions. Word has length 19 [2021-05-03 14:07:06,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:06,493 INFO L480 AbstractCegarLoop]: Abstraction has 825 states and 2475 transitions. [2021-05-03 14:07:06,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:06,493 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2475 transitions. [2021-05-03 14:07:06,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:06,494 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:06,494 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:06,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5576 [2021-05-03 14:07:06,694 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:06,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:06,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1244649766, now seen corresponding path program 203 times [2021-05-03 14:07:06,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:06,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85201223] [2021-05-03 14:07:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:06,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85201223] [2021-05-03 14:07:06,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321894074] [2021-05-03 14:07:06,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:06,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:07:06,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:06,802 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:06,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:07,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:07,087 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 [2021-05-03 14:07:07,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:07,341 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:07,342 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:07,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:07,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:07,472 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:07,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:07,473 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:07,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:07,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:07:07,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113315841] [2021-05-03 14:07:07,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:07:07,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:07,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:07:07,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:07,506 INFO L87 Difference]: Start difference. First operand 825 states and 2475 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:08,280 INFO L93 Difference]: Finished difference Result 1003 states and 2905 transitions. [2021-05-03 14:07:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 14:07:08,281 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:08,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:08,282 INFO L225 Difference]: With dead ends: 1003 [2021-05-03 14:07:08,282 INFO L226 Difference]: Without dead ends: 993 [2021-05-03 14:07:08,282 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 619.3ms TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:07:08,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-05-03 14:07:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 875. [2021-05-03 14:07:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.011441647597254) internal successors, (2632), 874 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2632 transitions. [2021-05-03 14:07:08,291 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2632 transitions. Word has length 19 [2021-05-03 14:07:08,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:08,291 INFO L480 AbstractCegarLoop]: Abstraction has 875 states and 2632 transitions. [2021-05-03 14:07:08,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:08,291 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2632 transitions. [2021-05-03 14:07:08,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:08,292 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:08,292 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:08,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5692,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:08,492 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:08,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1560912534, now seen corresponding path program 204 times [2021-05-03 14:07:08,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:08,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089244743] [2021-05-03 14:07:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:08,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089244743] [2021-05-03 14:07:08,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134446633] [2021-05-03 14:07:08,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:08,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:07:08,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:08,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:08,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:08,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:08,971 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 [2021-05-03 14:07:09,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:09,201 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:09,202 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:09,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:09,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:09,288 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:09,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:09,289 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:09,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:09,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:07:09,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667535504] [2021-05-03 14:07:09,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:07:09,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:09,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:07:09,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:07:09,322 INFO L87 Difference]: Start difference. First operand 875 states and 2632 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:10,339 INFO L93 Difference]: Finished difference Result 1134 states and 3184 transitions. [2021-05-03 14:07:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 14:07:10,340 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:10,341 INFO L225 Difference]: With dead ends: 1134 [2021-05-03 14:07:10,341 INFO L226 Difference]: Without dead ends: 1100 [2021-05-03 14:07:10,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 874.6ms TimeCoverageRelationStatistics Valid=307, Invalid=2345, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 14:07:10,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-05-03 14:07:10,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 884. [2021-05-03 14:07:10,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.0067950169875424) internal successors, (2655), 883 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2655 transitions. [2021-05-03 14:07:10,350 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2655 transitions. Word has length 19 [2021-05-03 14:07:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:10,350 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 2655 transitions. [2021-05-03 14:07:10,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:10,350 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2655 transitions. [2021-05-03 14:07:10,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:10,351 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:10,351 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:10,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5802 [2021-05-03 14:07:10,552 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:10,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:10,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1660969382, now seen corresponding path program 205 times [2021-05-03 14:07:10,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:10,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84349394] [2021-05-03 14:07:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:10,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84349394] [2021-05-03 14:07:10,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240912012] [2021-05-03 14:07:10,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:10,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:10,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:10,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:10,984 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 [2021-05-03 14:07:11,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:11,200 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:11,200 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:11,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:11,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:11,329 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:11,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:11,330 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:11,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:11,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:07:11,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083891961] [2021-05-03 14:07:11,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:07:11,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:11,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:07:11,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:07:11,363 INFO L87 Difference]: Start difference. First operand 884 states and 2655 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:12,169 INFO L93 Difference]: Finished difference Result 1000 states and 2894 transitions. [2021-05-03 14:07:12,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:07:12,170 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:12,171 INFO L225 Difference]: With dead ends: 1000 [2021-05-03 14:07:12,171 INFO L226 Difference]: Without dead ends: 985 [2021-05-03 14:07:12,171 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 729.6ms TimeCoverageRelationStatistics Valid=246, Invalid=1646, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 14:07:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-05-03 14:07:12,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 889. [2021-05-03 14:07:12,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.0033783783783785) internal successors, (2667), 888 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:12,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2667 transitions. [2021-05-03 14:07:12,179 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2667 transitions. Word has length 19 [2021-05-03 14:07:12,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:12,179 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2667 transitions. [2021-05-03 14:07:12,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:12,180 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2667 transitions. [2021-05-03 14:07:12,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:12,180 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:12,180 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:12,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5893 [2021-05-03 14:07:12,381 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:12,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:12,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1539906326, now seen corresponding path program 206 times [2021-05-03 14:07:12,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:12,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418260437] [2021-05-03 14:07:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:12,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418260437] [2021-05-03 14:07:12,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320183908] [2021-05-03 14:07:12,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:12,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:12,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:12,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:12,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:12,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:12,824 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 [2021-05-03 14:07:12,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:13,061 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:13,061 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:13,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:13,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:13,154 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:13,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:13,155 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:13,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:13,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:07:13,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138646205] [2021-05-03 14:07:13,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:07:13,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:13,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:07:13,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:13,188 INFO L87 Difference]: Start difference. First operand 889 states and 2667 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:14,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:14,048 INFO L93 Difference]: Finished difference Result 1045 states and 2995 transitions. [2021-05-03 14:07:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:07:14,049 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:14,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:14,050 INFO L225 Difference]: With dead ends: 1045 [2021-05-03 14:07:14,050 INFO L226 Difference]: Without dead ends: 1030 [2021-05-03 14:07:14,050 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 851.5ms TimeCoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 14:07:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-05-03 14:07:14,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 889. [2021-05-03 14:07:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.009009009009009) internal successors, (2672), 888 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:14,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2672 transitions. [2021-05-03 14:07:14,059 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2672 transitions. Word has length 19 [2021-05-03 14:07:14,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:14,059 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2672 transitions. [2021-05-03 14:07:14,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:14,059 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2672 transitions. [2021-05-03 14:07:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:14,060 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:14,060 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:14,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5995,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:14,260 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:14,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:14,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1982805466, now seen corresponding path program 207 times [2021-05-03 14:07:14,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:14,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553768167] [2021-05-03 14:07:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:14,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553768167] [2021-05-03 14:07:14,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826185358] [2021-05-03 14:07:14,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:14,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:07:14,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:14,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:14,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:14,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:14,732 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 [2021-05-03 14:07:14,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:14,966 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:14,966 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:14,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:15,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:15,178 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:15,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:15,179 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:15,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:15,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:07:15,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305139408] [2021-05-03 14:07:15,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:07:15,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:15,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:07:15,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:15,217 INFO L87 Difference]: Start difference. First operand 889 states and 2672 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:15,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:15,869 INFO L93 Difference]: Finished difference Result 997 states and 2917 transitions. [2021-05-03 14:07:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:07:15,869 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:15,870 INFO L225 Difference]: With dead ends: 997 [2021-05-03 14:07:15,870 INFO L226 Difference]: Without dead ends: 992 [2021-05-03 14:07:15,871 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 720.7ms TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 14:07:15,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-05-03 14:07:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 889. [2021-05-03 14:07:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.009009009009009) internal successors, (2672), 888 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:15,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2672 transitions. [2021-05-03 14:07:15,880 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2672 transitions. Word has length 19 [2021-05-03 14:07:15,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:15,880 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2672 transitions. [2021-05-03 14:07:15,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:15,880 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2672 transitions. [2021-05-03 14:07:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:15,881 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:15,881 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:16,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6097 [2021-05-03 14:07:16,081 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:16,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2055345422, now seen corresponding path program 208 times [2021-05-03 14:07:16,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:16,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399362963] [2021-05-03 14:07:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:16,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399362963] [2021-05-03 14:07:16,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303508260] [2021-05-03 14:07:16,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:16,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:16,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:16,237 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:16,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:16,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:16,562 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 [2021-05-03 14:07:16,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:16,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:16,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:16,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:07:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:16,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:16,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:07:16,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824093493] [2021-05-03 14:07:16,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:07:16,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:16,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:07:16,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:16,657 INFO L87 Difference]: Start difference. First operand 889 states and 2672 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:17,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:17,127 INFO L93 Difference]: Finished difference Result 952 states and 2781 transitions. [2021-05-03 14:07:17,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:07:17,128 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:17,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:17,129 INFO L225 Difference]: With dead ends: 952 [2021-05-03 14:07:17,129 INFO L226 Difference]: Without dead ends: 924 [2021-05-03 14:07:17,129 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 449.2ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:07:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-05-03 14:07:17,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 889. [2021-05-03 14:07:17,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.001126126126126) internal successors, (2665), 888 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:17,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2665 transitions. [2021-05-03 14:07:17,138 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2665 transitions. Word has length 19 [2021-05-03 14:07:17,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:17,138 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2665 transitions. [2021-05-03 14:07:17,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:17,138 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2665 transitions. [2021-05-03 14:07:17,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:17,139 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:17,139 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:17,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6217,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:17,340 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:17,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:17,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1927527824, now seen corresponding path program 209 times [2021-05-03 14:07:17,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:17,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639000284] [2021-05-03 14:07:17,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:17,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639000284] [2021-05-03 14:07:17,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698601221] [2021-05-03 14:07:17,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:17,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:07:17,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:17,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:17,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:17,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:17,767 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 [2021-05-03 14:07:17,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:17,984 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:17,985 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:17,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:18,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:18,101 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:18,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:18,102 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:18,133 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:18,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:18,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:07:18,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836921182] [2021-05-03 14:07:18,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:07:18,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:18,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:07:18,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:07:18,134 INFO L87 Difference]: Start difference. First operand 889 states and 2665 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:19,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:19,240 INFO L93 Difference]: Finished difference Result 1134 states and 3182 transitions. [2021-05-03 14:07:19,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 14:07:19,241 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:19,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:19,242 INFO L225 Difference]: With dead ends: 1134 [2021-05-03 14:07:19,242 INFO L226 Difference]: Without dead ends: 1107 [2021-05-03 14:07:19,243 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 980.2ms TimeCoverageRelationStatistics Valid=362, Invalid=2608, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 14:07:19,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-05-03 14:07:19,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 889. [2021-05-03 14:07:19,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.9977477477477477) internal successors, (2662), 888 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:19,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2662 transitions. [2021-05-03 14:07:19,259 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2662 transitions. Word has length 19 [2021-05-03 14:07:19,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:19,259 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2662 transitions. [2021-05-03 14:07:19,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:19,259 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2662 transitions. [2021-05-03 14:07:19,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:19,260 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:19,260 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:19,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6269,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:19,460 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:19,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1273347884, now seen corresponding path program 210 times [2021-05-03 14:07:19,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:19,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849093489] [2021-05-03 14:07:19,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:19,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849093489] [2021-05-03 14:07:19,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056134360] [2021-05-03 14:07:19,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:19,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:07:19,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:19,643 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:19,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:20,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:20,026 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 [2021-05-03 14:07:20,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:20,318 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:20,319 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:20,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:20,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:20,504 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:20,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:20,505 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:20,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:20,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:07:20,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988395746] [2021-05-03 14:07:20,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:07:20,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:20,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:07:20,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:20,541 INFO L87 Difference]: Start difference. First operand 889 states and 2662 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:21,605 INFO L93 Difference]: Finished difference Result 1135 states and 3226 transitions. [2021-05-03 14:07:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 14:07:21,606 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:21,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:21,607 INFO L225 Difference]: With dead ends: 1135 [2021-05-03 14:07:21,607 INFO L226 Difference]: Without dead ends: 1106 [2021-05-03 14:07:21,608 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1083.6ms TimeCoverageRelationStatistics Valid=348, Invalid=2304, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 14:07:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-05-03 14:07:21,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 867. [2021-05-03 14:07:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 2.9976905311778292) internal successors, (2596), 866 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2596 transitions. [2021-05-03 14:07:21,617 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2596 transitions. Word has length 19 [2021-05-03 14:07:21,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:21,617 INFO L480 AbstractCegarLoop]: Abstraction has 867 states and 2596 transitions. [2021-05-03 14:07:21,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:21,617 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2596 transitions. [2021-05-03 14:07:21,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:21,618 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:21,618 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:21,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6359,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:21,818 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:21,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:21,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1716247024, now seen corresponding path program 211 times [2021-05-03 14:07:21,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:21,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586142480] [2021-05-03 14:07:21,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:21,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586142480] [2021-05-03 14:07:21,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091815202] [2021-05-03 14:07:21,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:21,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:21,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:22,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:22,254 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 [2021-05-03 14:07:22,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:22,490 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:22,491 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:22,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:22,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:22,624 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:22,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:22,625 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:22,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:22,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:07:22,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353413167] [2021-05-03 14:07:22,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:07:22,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:22,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:07:22,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:22,658 INFO L87 Difference]: Start difference. First operand 867 states and 2596 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:23,551 INFO L93 Difference]: Finished difference Result 1062 states and 3058 transitions. [2021-05-03 14:07:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:07:23,551 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:23,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:23,552 INFO L225 Difference]: With dead ends: 1062 [2021-05-03 14:07:23,552 INFO L226 Difference]: Without dead ends: 1052 [2021-05-03 14:07:23,553 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 846.9ms TimeCoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 14:07:23,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-05-03 14:07:23,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 869. [2021-05-03 14:07:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.9976958525345623) internal successors, (2602), 868 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2602 transitions. [2021-05-03 14:07:23,561 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2602 transitions. Word has length 19 [2021-05-03 14:07:23,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:23,561 INFO L480 AbstractCegarLoop]: Abstraction has 869 states and 2602 transitions. [2021-05-03 14:07:23,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:23,561 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2602 transitions. [2021-05-03 14:07:23,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:23,562 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:23,562 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:23,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6495 [2021-05-03 14:07:23,763 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:23,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:23,763 INFO L82 PathProgramCache]: Analyzing trace with hash 789143798, now seen corresponding path program 212 times [2021-05-03 14:07:23,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:23,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269827647] [2021-05-03 14:07:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:23,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269827647] [2021-05-03 14:07:23,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296025960] [2021-05-03 14:07:23,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:23,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:23,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:23,885 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:23,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:24,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:24,205 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 [2021-05-03 14:07:24,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:24,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:24,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:24,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:07:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:24,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:24,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:07:24,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317477580] [2021-05-03 14:07:24,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:07:24,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:24,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:07:24,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:07:24,336 INFO L87 Difference]: Start difference. First operand 869 states and 2602 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:24,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:24,720 INFO L93 Difference]: Finished difference Result 915 states and 2683 transitions. [2021-05-03 14:07:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:07:24,721 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:24,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:24,722 INFO L225 Difference]: With dead ends: 915 [2021-05-03 14:07:24,722 INFO L226 Difference]: Without dead ends: 897 [2021-05-03 14:07:24,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 386.6ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:07:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-05-03 14:07:24,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 869. [2021-05-03 14:07:24,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.9953917050691246) internal successors, (2600), 868 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2600 transitions. [2021-05-03 14:07:24,731 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2600 transitions. Word has length 19 [2021-05-03 14:07:24,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:24,731 INFO L480 AbstractCegarLoop]: Abstraction has 869 states and 2600 transitions. [2021-05-03 14:07:24,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:24,731 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2600 transitions. [2021-05-03 14:07:24,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:24,732 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:24,732 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:24,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6607 [2021-05-03 14:07:24,932 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:24,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:24,933 INFO L82 PathProgramCache]: Analyzing trace with hash 28116982, now seen corresponding path program 213 times [2021-05-03 14:07:24,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:24,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058048970] [2021-05-03 14:07:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:25,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058048970] [2021-05-03 14:07:25,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306150238] [2021-05-03 14:07:25,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:25,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:07:25,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:25,065 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:25,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:25,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:25,382 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 [2021-05-03 14:07:25,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:25,614 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:25,614 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:25,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:25,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:25,867 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:25,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:25,868 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:25,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:25,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:07:25,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535599836] [2021-05-03 14:07:25,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:07:25,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:25,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:07:25,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:25,901 INFO L87 Difference]: Start difference. First operand 869 states and 2600 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:27,040 INFO L93 Difference]: Finished difference Result 1107 states and 3182 transitions. [2021-05-03 14:07:27,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:07:27,040 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:27,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:27,042 INFO L225 Difference]: With dead ends: 1107 [2021-05-03 14:07:27,042 INFO L226 Difference]: Without dead ends: 1097 [2021-05-03 14:07:27,042 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1059.2ms TimeCoverageRelationStatistics Valid=341, Invalid=2109, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 14:07:27,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-05-03 14:07:27,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 896. [2021-05-03 14:07:27,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.9966480446927375) internal successors, (2682), 895 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2682 transitions. [2021-05-03 14:07:27,051 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2682 transitions. Word has length 19 [2021-05-03 14:07:27,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:27,051 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2682 transitions. [2021-05-03 14:07:27,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:27,051 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2682 transitions. [2021-05-03 14:07:27,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:27,052 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:27,052 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:27,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6671,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:27,253 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:27,253 INFO L82 PathProgramCache]: Analyzing trace with hash 49617522, now seen corresponding path program 214 times [2021-05-03 14:07:27,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:27,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159189372] [2021-05-03 14:07:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:27,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159189372] [2021-05-03 14:07:27,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574456589] [2021-05-03 14:07:27,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:27,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:27,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:27,361 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:27,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:27,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:27,668 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 [2021-05-03 14:07:27,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:27,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:27,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:27,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-05-03 14:07:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:27,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:27,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:07:27,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370473251] [2021-05-03 14:07:27,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:07:27,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:27,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:07:27,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:27,753 INFO L87 Difference]: Start difference. First operand 896 states and 2682 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:28,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:28,180 INFO L93 Difference]: Finished difference Result 1009 states and 2994 transitions. [2021-05-03 14:07:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:07:28,180 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:28,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:28,182 INFO L225 Difference]: With dead ends: 1009 [2021-05-03 14:07:28,182 INFO L226 Difference]: Without dead ends: 995 [2021-05-03 14:07:28,182 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-05-03 14:07:28,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 972. [2021-05-03 14:07:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.015447991761071) internal successors, (2928), 971 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 2928 transitions. [2021-05-03 14:07:28,191 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 2928 transitions. Word has length 19 [2021-05-03 14:07:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:28,191 INFO L480 AbstractCegarLoop]: Abstraction has 972 states and 2928 transitions. [2021-05-03 14:07:28,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:28,191 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 2928 transitions. [2021-05-03 14:07:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:28,192 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:28,192 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:28,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6841 [2021-05-03 14:07:28,393 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:28,393 INFO L82 PathProgramCache]: Analyzing trace with hash 908492052, now seen corresponding path program 215 times [2021-05-03 14:07:28,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:28,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761802001] [2021-05-03 14:07:28,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:28,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761802001] [2021-05-03 14:07:28,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167322082] [2021-05-03 14:07:28,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:07:28,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:07:28,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:28,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:28,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:28,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:28,853 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 [2021-05-03 14:07:28,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:29,088 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:29,089 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:29,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:29,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:29,232 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:29,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:29,233 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:29,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:29,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:07:29,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542929795] [2021-05-03 14:07:29,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:07:29,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:29,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:07:29,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:29,267 INFO L87 Difference]: Start difference. First operand 972 states and 2928 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:30,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:30,332 INFO L93 Difference]: Finished difference Result 1109 states and 3246 transitions. [2021-05-03 14:07:30,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 14:07:30,332 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:30,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:30,333 INFO L225 Difference]: With dead ends: 1109 [2021-05-03 14:07:30,333 INFO L226 Difference]: Without dead ends: 1099 [2021-05-03 14:07:30,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 841.4ms TimeCoverageRelationStatistics Valid=291, Invalid=2259, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 14:07:30,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-05-03 14:07:30,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 976. [2021-05-03 14:07:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 3.0194871794871796) internal successors, (2944), 975 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 2944 transitions. [2021-05-03 14:07:30,343 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 2944 transitions. Word has length 19 [2021-05-03 14:07:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:30,343 INFO L480 AbstractCegarLoop]: Abstraction has 976 states and 2944 transitions. [2021-05-03 14:07:30,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 2944 transitions. [2021-05-03 14:07:30,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:30,344 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:30,344 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:30,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6892 [2021-05-03 14:07:30,545 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:30,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1675861936, now seen corresponding path program 216 times [2021-05-03 14:07:30,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:30,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646231289] [2021-05-03 14:07:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:30,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646231289] [2021-05-03 14:07:30,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309629102] [2021-05-03 14:07:30,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:30,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:07:30,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:30,668 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:30,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:30,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:30,961 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 [2021-05-03 14:07:31,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:31,187 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:31,188 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:31,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:31,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:31,291 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:31,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:31,292 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:31,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:31,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:07:31,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681627412] [2021-05-03 14:07:31,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:07:31,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:31,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:07:31,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:31,325 INFO L87 Difference]: Start difference. First operand 976 states and 2944 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:32,264 INFO L93 Difference]: Finished difference Result 1144 states and 3334 transitions. [2021-05-03 14:07:32,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 14:07:32,264 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:32,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:32,266 INFO L225 Difference]: With dead ends: 1144 [2021-05-03 14:07:32,266 INFO L226 Difference]: Without dead ends: 1134 [2021-05-03 14:07:32,266 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 720.0ms TimeCoverageRelationStatistics Valid=229, Invalid=2027, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 14:07:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-05-03 14:07:32,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1010. [2021-05-03 14:07:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 3.0297324083250743) internal successors, (3057), 1009 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 3057 transitions. [2021-05-03 14:07:32,277 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 3057 transitions. Word has length 19 [2021-05-03 14:07:32,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:32,277 INFO L480 AbstractCegarLoop]: Abstraction has 1010 states and 3057 transitions. [2021-05-03 14:07:32,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:32,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 3057 transitions. [2021-05-03 14:07:32,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:32,278 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:32,278 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:32,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7020,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:32,480 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:32,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:32,480 INFO L82 PathProgramCache]: Analyzing trace with hash -186456940, now seen corresponding path program 217 times [2021-05-03 14:07:32,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:32,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126662081] [2021-05-03 14:07:32,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:32,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126662081] [2021-05-03 14:07:32,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144811621] [2021-05-03 14:07:32,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:32,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:32,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:32,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:32,894 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 [2021-05-03 14:07:33,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:33,158 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:33,158 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:33,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:33,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:33,274 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:33,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:33,275 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:33,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:33,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:07:33,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139791774] [2021-05-03 14:07:33,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:07:33,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:33,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:07:33,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:33,308 INFO L87 Difference]: Start difference. First operand 1010 states and 3057 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:34,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:34,364 INFO L93 Difference]: Finished difference Result 1206 states and 3490 transitions. [2021-05-03 14:07:34,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 14:07:34,364 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:34,366 INFO L225 Difference]: With dead ends: 1206 [2021-05-03 14:07:34,366 INFO L226 Difference]: Without dead ends: 1191 [2021-05-03 14:07:34,366 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 791.7ms TimeCoverageRelationStatistics Valid=268, Invalid=1988, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 14:07:34,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-05-03 14:07:34,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1047. [2021-05-03 14:07:34,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.0315487571701722) internal successors, (3171), 1046 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3171 transitions. [2021-05-03 14:07:34,376 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3171 transitions. Word has length 19 [2021-05-03 14:07:34,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:34,376 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3171 transitions. [2021-05-03 14:07:34,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3171 transitions. [2021-05-03 14:07:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:34,377 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:34,378 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:34,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7116,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:34,578 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:34,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1259542320, now seen corresponding path program 218 times [2021-05-03 14:07:34,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:34,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288470069] [2021-05-03 14:07:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:34,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288470069] [2021-05-03 14:07:34,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641232327] [2021-05-03 14:07:34,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:34,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:34,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:34,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:34,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:35,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:35,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-05-03 14:07:35,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:35,246 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:35,247 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:35,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:35,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:35,374 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:35,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:35,374 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:35,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:35,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:07:35,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206411646] [2021-05-03 14:07:35,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:07:35,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:35,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:07:35,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:07:35,408 INFO L87 Difference]: Start difference. First operand 1047 states and 3171 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:36,695 INFO L93 Difference]: Finished difference Result 1314 states and 3702 transitions. [2021-05-03 14:07:36,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 14:07:36,696 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:36,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:36,697 INFO L225 Difference]: With dead ends: 1314 [2021-05-03 14:07:36,697 INFO L226 Difference]: Without dead ends: 1289 [2021-05-03 14:07:36,697 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1105.5ms TimeCoverageRelationStatistics Valid=426, Invalid=3114, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 14:07:36,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-05-03 14:07:36,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1050. [2021-05-03 14:07:36,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 3.0276453765490943) internal successors, (3176), 1049 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:36,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 3176 transitions. [2021-05-03 14:07:36,707 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 3176 transitions. Word has length 19 [2021-05-03 14:07:36,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:36,707 INFO L480 AbstractCegarLoop]: Abstraction has 1050 states and 3176 transitions. [2021-05-03 14:07:36,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:36,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 3176 transitions. [2021-05-03 14:07:36,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:36,708 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:36,709 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:36,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7236 [2021-05-03 14:07:36,909 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:36,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:36,909 INFO L82 PathProgramCache]: Analyzing trace with hash -165450732, now seen corresponding path program 219 times [2021-05-03 14:07:36,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:36,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285033785] [2021-05-03 14:07:36,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:37,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285033785] [2021-05-03 14:07:37,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725140151] [2021-05-03 14:07:37,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:37,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:07:37,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:37,037 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:37,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:37,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:37,353 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 [2021-05-03 14:07:37,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:37,585 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:37,586 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:37,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:37,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:37,801 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:37,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:37,802 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:37,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:37,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:07:37,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913825539] [2021-05-03 14:07:37,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:07:37,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:37,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:07:37,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:07:37,836 INFO L87 Difference]: Start difference. First operand 1050 states and 3176 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:38,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:38,727 INFO L93 Difference]: Finished difference Result 1208 states and 3517 transitions. [2021-05-03 14:07:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:07:38,728 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:38,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:38,729 INFO L225 Difference]: With dead ends: 1208 [2021-05-03 14:07:38,729 INFO L226 Difference]: Without dead ends: 1193 [2021-05-03 14:07:38,729 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 897.1ms TimeCoverageRelationStatistics Valid=310, Invalid=1852, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 14:07:38,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-05-03 14:07:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1057. [2021-05-03 14:07:38,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 3.024621212121212) internal successors, (3194), 1056 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 3194 transitions. [2021-05-03 14:07:38,740 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 3194 transitions. Word has length 19 [2021-05-03 14:07:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:38,740 INFO L480 AbstractCegarLoop]: Abstraction has 1057 states and 3194 transitions. [2021-05-03 14:07:38,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 3194 transitions. [2021-05-03 14:07:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:38,741 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:38,741 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:38,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7342 [2021-05-03 14:07:38,942 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:38,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:38,942 INFO L82 PathProgramCache]: Analyzing trace with hash -608349872, now seen corresponding path program 220 times [2021-05-03 14:07:38,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:38,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125355447] [2021-05-03 14:07:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:39,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125355447] [2021-05-03 14:07:39,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528294457] [2021-05-03 14:07:39,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:39,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:39,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:39,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:39,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:39,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:39,396 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 [2021-05-03 14:07:39,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:39,777 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:39,778 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:39,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:40,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:40,046 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:40,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:40,047 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:40,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:40,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:07:40,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523067207] [2021-05-03 14:07:40,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:07:40,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:40,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:07:40,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:40,081 INFO L87 Difference]: Start difference. First operand 1057 states and 3194 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:41,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:41,059 INFO L93 Difference]: Finished difference Result 1268 states and 3657 transitions. [2021-05-03 14:07:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:07:41,059 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:41,061 INFO L225 Difference]: With dead ends: 1268 [2021-05-03 14:07:41,061 INFO L226 Difference]: Without dead ends: 1253 [2021-05-03 14:07:41,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 993.5ms TimeCoverageRelationStatistics Valid=314, Invalid=1848, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 14:07:41,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-05-03 14:07:41,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1056. [2021-05-03 14:07:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 3.0274881516587677) internal successors, (3194), 1055 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 3194 transitions. [2021-05-03 14:07:41,072 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 3194 transitions. Word has length 19 [2021-05-03 14:07:41,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:41,072 INFO L480 AbstractCegarLoop]: Abstraction has 1056 states and 3194 transitions. [2021-05-03 14:07:41,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 3194 transitions. [2021-05-03 14:07:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:07:41,073 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:41,073 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:41,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7465 [2021-05-03 14:07:41,273 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:41,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1453321324, now seen corresponding path program 221 times [2021-05-03 14:07:41,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:41,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167730933] [2021-05-03 14:07:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:41,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167730933] [2021-05-03 14:07:41,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717369282] [2021-05-03 14:07:41,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:41,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:07:41,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:41,413 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-03 14:07:41,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:41,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:41,735 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 [2021-05-03 14:07:41,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:41,961 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 14:07:41,962 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-05-03 14:07:41,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-05-03 14:07:42,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:07:42,102 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:07:42,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:07:42,103 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-05-03 14:07:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:42,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:42,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:07:42,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869973335] [2021-05-03 14:07:42,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:07:42,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:42,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:07:42,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:42,137 INFO L87 Difference]: Start difference. First operand 1056 states and 3194 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:42,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:42,973 INFO L93 Difference]: Finished difference Result 1209 states and 3557 transitions. [2021-05-03 14:07:42,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:07:42,974 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:07:42,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:42,975 INFO L225 Difference]: With dead ends: 1209 [2021-05-03 14:07:42,975 INFO L226 Difference]: Without dead ends: 1204 [2021-05-03 14:07:42,975 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 831.2ms TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:07:42,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-05-03 14:07:42,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1058. [2021-05-03 14:07:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.024597918637654) internal successors, (3197), 1057 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3197 transitions. [2021-05-03 14:07:42,986 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3197 transitions. Word has length 19 [2021-05-03 14:07:42,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:42,986 INFO L480 AbstractCegarLoop]: Abstraction has 1058 states and 3197 transitions. [2021-05-03 14:07:42,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:42,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3197 transitions. [2021-05-03 14:07:42,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:07:42,987 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:42,987 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:43,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7737 [2021-05-03 14:07:43,188 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:43,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:43,188 INFO L82 PathProgramCache]: Analyzing trace with hash -2016450674, now seen corresponding path program 222 times [2021-05-03 14:07:43,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:43,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860768943] [2021-05-03 14:07:43,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:43,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860768943] [2021-05-03 14:07:43,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468851057] [2021-05-03 14:07:43,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:43,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:07:43,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:43,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:07:43,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:43,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:43,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:07:43,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:43,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:43,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:43,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:07:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:43,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:43,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:07:43,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567272049] [2021-05-03 14:07:43,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:07:43,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:43,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:07:43,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:43,984 INFO L87 Difference]: Start difference. First operand 1058 states and 3197 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:44,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:44,559 INFO L93 Difference]: Finished difference Result 1126 states and 3328 transitions. [2021-05-03 14:07:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:07:44,559 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:07:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:44,561 INFO L225 Difference]: With dead ends: 1126 [2021-05-03 14:07:44,561 INFO L226 Difference]: Without dead ends: 1113 [2021-05-03 14:07:44,561 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 545.5ms TimeCoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:07:44,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-05-03 14:07:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1063. [2021-05-03 14:07:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 3.019774011299435) internal successors, (3207), 1062 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3207 transitions. [2021-05-03 14:07:44,572 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3207 transitions. Word has length 20 [2021-05-03 14:07:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:44,572 INFO L480 AbstractCegarLoop]: Abstraction has 1063 states and 3207 transitions. [2021-05-03 14:07:44,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3207 transitions. [2021-05-03 14:07:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:07:44,573 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:44,573 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:44,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7852 [2021-05-03 14:07:44,774 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:44,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:44,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2008627890, now seen corresponding path program 223 times [2021-05-03 14:07:44,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:44,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975666565] [2021-05-03 14:07:44,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:44,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975666565] [2021-05-03 14:07:44,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699795500] [2021-05-03 14:07:44,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:44,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:07:44,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:45,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:45,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:07:45,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:45,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:45,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:45,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:07:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:45,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:45,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:07:45,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504121140] [2021-05-03 14:07:45,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:07:45,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:45,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:07:45,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:45,418 INFO L87 Difference]: Start difference. First operand 1063 states and 3207 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:45,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:45,952 INFO L93 Difference]: Finished difference Result 1193 states and 3423 transitions. [2021-05-03 14:07:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:07:45,953 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:07:45,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:45,955 INFO L225 Difference]: With dead ends: 1193 [2021-05-03 14:07:45,955 INFO L226 Difference]: Without dead ends: 1184 [2021-05-03 14:07:45,955 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:07:45,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-05-03 14:07:45,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1065. [2021-05-03 14:07:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.0197368421052633) internal successors, (3213), 1064 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3213 transitions. [2021-05-03 14:07:45,966 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3213 transitions. Word has length 20 [2021-05-03 14:07:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:45,966 INFO L480 AbstractCegarLoop]: Abstraction has 1065 states and 3213 transitions. [2021-05-03 14:07:45,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3213 transitions. [2021-05-03 14:07:45,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:07:45,967 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:45,967 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:46,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7966,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:46,167 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:46,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:46,168 INFO L82 PathProgramCache]: Analyzing trace with hash 560859948, now seen corresponding path program 224 times [2021-05-03 14:07:46,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:46,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716604909] [2021-05-03 14:07:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:46,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716604909] [2021-05-03 14:07:46,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269965963] [2021-05-03 14:07:46,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:46,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:46,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:46,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:07:46,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:46,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:46,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:07:47,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:47,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:47,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:47,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:07:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:47,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:47,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:07:47,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534015175] [2021-05-03 14:07:47,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:07:47,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:47,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:07:47,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:47,250 INFO L87 Difference]: Start difference. First operand 1065 states and 3213 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:47,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:47,786 INFO L93 Difference]: Finished difference Result 1199 states and 3459 transitions. [2021-05-03 14:07:47,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:07:47,787 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:07:47,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:47,789 INFO L225 Difference]: With dead ends: 1199 [2021-05-03 14:07:47,789 INFO L226 Difference]: Without dead ends: 1194 [2021-05-03 14:07:47,789 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 417.7ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:07:47,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-05-03 14:07:47,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1065. [2021-05-03 14:07:47,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.0197368421052633) internal successors, (3213), 1064 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:47,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3213 transitions. [2021-05-03 14:07:47,800 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3213 transitions. Word has length 20 [2021-05-03 14:07:47,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:47,800 INFO L480 AbstractCegarLoop]: Abstraction has 1065 states and 3213 transitions. [2021-05-03 14:07:47,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:47,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3213 transitions. [2021-05-03 14:07:47,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:07:47,801 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:47,801 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:48,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8051 [2021-05-03 14:07:48,002 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:48,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:48,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1075164181, now seen corresponding path program 225 times [2021-05-03 14:07:48,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:48,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6014315] [2021-05-03 14:07:48,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:48,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6014315] [2021-05-03 14:07:48,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12682240] [2021-05-03 14:07:48,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:48,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:07:48,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:48,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:07:48,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:48,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:48,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:07:48,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935179892] [2021-05-03 14:07:48,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:07:48,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:48,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:07:48,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:07:48,124 INFO L87 Difference]: Start difference. First operand 1065 states and 3213 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:48,187 INFO L93 Difference]: Finished difference Result 1365 states and 3760 transitions. [2021-05-03 14:07:48,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:07:48,187 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:07:48,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:48,189 INFO L225 Difference]: With dead ends: 1365 [2021-05-03 14:07:48,189 INFO L226 Difference]: Without dead ends: 1365 [2021-05-03 14:07:48,189 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:07:48,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-05-03 14:07:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1073. [2021-05-03 14:07:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0261194029850746) internal successors, (3244), 1072 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3244 transitions. [2021-05-03 14:07:48,201 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3244 transitions. Word has length 20 [2021-05-03 14:07:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:48,201 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3244 transitions. [2021-05-03 14:07:48,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3244 transitions. [2021-05-03 14:07:48,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:07:48,202 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:48,202 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:48,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8326,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:48,403 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:48,403 INFO L82 PathProgramCache]: Analyzing trace with hash 421097848, now seen corresponding path program 226 times [2021-05-03 14:07:48,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:48,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984130669] [2021-05-03 14:07:48,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:48,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984130669] [2021-05-03 14:07:48,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124258741] [2021-05-03 14:07:48,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:48,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:48,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:48,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:07:48,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:48,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:48,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:07:49,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:49,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:49,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:49,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:07:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:49,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:49,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:07:49,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465684932] [2021-05-03 14:07:49,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:07:49,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:49,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:07:49,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:49,056 INFO L87 Difference]: Start difference. First operand 1073 states and 3244 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:49,467 INFO L93 Difference]: Finished difference Result 1199 states and 3479 transitions. [2021-05-03 14:07:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:07:49,468 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:07:49,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:49,469 INFO L225 Difference]: With dead ends: 1199 [2021-05-03 14:07:49,469 INFO L226 Difference]: Without dead ends: 1194 [2021-05-03 14:07:49,470 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 367.9ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:07:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-05-03 14:07:49,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1079. [2021-05-03 14:07:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.031539888682746) internal successors, (3268), 1078 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:49,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3268 transitions. [2021-05-03 14:07:49,480 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3268 transitions. Word has length 20 [2021-05-03 14:07:49,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:49,480 INFO L480 AbstractCegarLoop]: Abstraction has 1079 states and 3268 transitions. [2021-05-03 14:07:49,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3268 transitions. [2021-05-03 14:07:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:07:49,481 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:49,481 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:49,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8327 [2021-05-03 14:07:49,681 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:49,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1304381610, now seen corresponding path program 227 times [2021-05-03 14:07:49,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:49,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425945436] [2021-05-03 14:07:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:49,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425945436] [2021-05-03 14:07:49,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635013309] [2021-05-03 14:07:49,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:49,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:07:49,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:49,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:07:49,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:50,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:50,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:07:50,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:50,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:50,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:50,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:07:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:50,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:50,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:07:50,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977293332] [2021-05-03 14:07:50,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:07:50,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:50,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:07:50,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:50,382 INFO L87 Difference]: Start difference. First operand 1079 states and 3268 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:50,933 INFO L93 Difference]: Finished difference Result 1210 states and 3510 transitions. [2021-05-03 14:07:50,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:07:50,933 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:07:50,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:50,935 INFO L225 Difference]: With dead ends: 1210 [2021-05-03 14:07:50,935 INFO L226 Difference]: Without dead ends: 1201 [2021-05-03 14:07:50,935 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 419.7ms TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:07:50,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-05-03 14:07:50,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1081. [2021-05-03 14:07:50,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 3.0296296296296297) internal successors, (3272), 1080 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:50,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 3272 transitions. [2021-05-03 14:07:50,946 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 3272 transitions. Word has length 20 [2021-05-03 14:07:50,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:50,946 INFO L480 AbstractCegarLoop]: Abstraction has 1081 states and 3272 transitions. [2021-05-03 14:07:50,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 3272 transitions. [2021-05-03 14:07:50,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:07:50,947 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:50,947 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:51,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8415,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:51,147 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:51,147 INFO L82 PathProgramCache]: Analyzing trace with hash 185023386, now seen corresponding path program 228 times [2021-05-03 14:07:51,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:51,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401042448] [2021-05-03 14:07:51,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:51,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401042448] [2021-05-03 14:07:51,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768518625] [2021-05-03 14:07:51,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:51,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:07:51,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:51,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:07:51,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:51,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:51,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:07:51,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:51,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:51,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:51,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:07:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:51,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:51,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:07:51,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752210045] [2021-05-03 14:07:51,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:07:51,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:51,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:07:51,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:51,887 INFO L87 Difference]: Start difference. First operand 1081 states and 3272 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:52,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:52,192 INFO L93 Difference]: Finished difference Result 1169 states and 3442 transitions. [2021-05-03 14:07:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:07:52,193 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:07:52,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:52,194 INFO L225 Difference]: With dead ends: 1169 [2021-05-03 14:07:52,194 INFO L226 Difference]: Without dead ends: 1164 [2021-05-03 14:07:52,194 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 350.7ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-05-03 14:07:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1082. [2021-05-03 14:07:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1081 states have (on average 3.0296022201665127) internal successors, (3275), 1081 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 3275 transitions. [2021-05-03 14:07:52,204 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 3275 transitions. Word has length 20 [2021-05-03 14:07:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:52,204 INFO L480 AbstractCegarLoop]: Abstraction has 1082 states and 3275 transitions. [2021-05-03 14:07:52,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 3275 transitions. [2021-05-03 14:07:52,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:07:52,205 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:52,205 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:52,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8519 [2021-05-03 14:07:52,406 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:52,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:52,406 INFO L82 PathProgramCache]: Analyzing trace with hash -706298245, now seen corresponding path program 229 times [2021-05-03 14:07:52,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:52,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928972912] [2021-05-03 14:07:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:52,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928972912] [2021-05-03 14:07:52,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974739725] [2021-05-03 14:07:52,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:52,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:07:52,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:52,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:52,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:07:52,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885878053] [2021-05-03 14:07:52,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:07:52,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:52,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:07:52,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:07:52,522 INFO L87 Difference]: Start difference. First operand 1082 states and 3275 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:52,614 INFO L93 Difference]: Finished difference Result 1465 states and 4016 transitions. [2021-05-03 14:07:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:07:52,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:07:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:52,616 INFO L225 Difference]: With dead ends: 1465 [2021-05-03 14:07:52,616 INFO L226 Difference]: Without dead ends: 1465 [2021-05-03 14:07:52,616 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-05-03 14:07:52,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1072. [2021-05-03 14:07:52,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 3.022408963585434) internal successors, (3237), 1071 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 3237 transitions. [2021-05-03 14:07:52,628 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 3237 transitions. Word has length 20 [2021-05-03 14:07:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:52,628 INFO L480 AbstractCegarLoop]: Abstraction has 1072 states and 3237 transitions. [2021-05-03 14:07:52,628 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) [2021-05-03 14:07:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 3237 transitions. [2021-05-03 14:07:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:07:52,629 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:52,629 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:52,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8647,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:52,831 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:52,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:52,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1248078420, now seen corresponding path program 230 times [2021-05-03 14:07:52,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:52,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653341585] [2021-05-03 14:07:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:07:52,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653341585] [2021-05-03 14:07:52,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016720123] [2021-05-03 14:07:52,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:52,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:52,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:52,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:07:52,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:53,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:53,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:07:53,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:53,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:53,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:53,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:07:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:53,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:53,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-05-03 14:07:53,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107139265] [2021-05-03 14:07:53,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:07:53,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:53,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:07:53,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:07:53,433 INFO L87 Difference]: Start difference. First operand 1072 states and 3237 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:53,773 INFO L93 Difference]: Finished difference Result 1095 states and 3276 transitions. [2021-05-03 14:07:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:07:53,774 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:07:53,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:53,775 INFO L225 Difference]: With dead ends: 1095 [2021-05-03 14:07:53,775 INFO L226 Difference]: Without dead ends: 1080 [2021-05-03 14:07:53,775 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 414.6ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:07:53,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-05-03 14:07:53,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1069. [2021-05-03 14:07:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.019662921348315) internal successors, (3225), 1068 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:53,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3225 transitions. [2021-05-03 14:07:53,785 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3225 transitions. Word has length 20 [2021-05-03 14:07:53,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:53,785 INFO L480 AbstractCegarLoop]: Abstraction has 1069 states and 3225 transitions. [2021-05-03 14:07:53,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:53,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3225 transitions. [2021-05-03 14:07:53,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:07:53,786 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:53,786 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:53,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8648,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:53,987 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:53,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:53,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1296543798, now seen corresponding path program 231 times [2021-05-03 14:07:53,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:53,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304867954] [2021-05-03 14:07:53,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:54,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304867954] [2021-05-03 14:07:54,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640939715] [2021-05-03 14:07:54,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:54,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:07:54,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:54,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:07:54,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:54,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:54,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:07:55,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:55,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:55,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:55,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:07:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:55,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:55,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:07:55,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431544012] [2021-05-03 14:07:55,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:07:55,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:55,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:07:55,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:55,162 INFO L87 Difference]: Start difference. First operand 1069 states and 3225 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:55,633 INFO L93 Difference]: Finished difference Result 1190 states and 3432 transitions. [2021-05-03 14:07:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:07:55,633 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:07:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:55,634 INFO L225 Difference]: With dead ends: 1190 [2021-05-03 14:07:55,634 INFO L226 Difference]: Without dead ends: 1167 [2021-05-03 14:07:55,635 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 533.8ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:07:55,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-05-03 14:07:55,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1068. [2021-05-03 14:07:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 3.0159325210871604) internal successors, (3218), 1067 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 3218 transitions. [2021-05-03 14:07:55,645 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 3218 transitions. Word has length 20 [2021-05-03 14:07:55,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:55,645 INFO L480 AbstractCegarLoop]: Abstraction has 1068 states and 3218 transitions. [2021-05-03 14:07:55,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:55,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 3218 transitions. [2021-05-03 14:07:55,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:07:55,646 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:55,646 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:55,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8724,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:55,847 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:55,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1566815602, now seen corresponding path program 232 times [2021-05-03 14:07:55,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:55,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447607243] [2021-05-03 14:07:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:55,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447607243] [2021-05-03 14:07:55,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523964569] [2021-05-03 14:07:55,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:55,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:55,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:55,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:07:55,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:56,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:56,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:07:56,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:56,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:56,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:56,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:07:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:56,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:56,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:07:56,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389627596] [2021-05-03 14:07:56,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:07:56,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:56,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:07:56,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:56,543 INFO L87 Difference]: Start difference. First operand 1068 states and 3218 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:56,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:56,926 INFO L93 Difference]: Finished difference Result 1170 states and 3412 transitions. [2021-05-03 14:07:56,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:07:56,927 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:07:56,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:56,928 INFO L225 Difference]: With dead ends: 1170 [2021-05-03 14:07:56,928 INFO L226 Difference]: Without dead ends: 1161 [2021-05-03 14:07:56,928 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 356.6ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:07:56,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-05-03 14:07:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1073. [2021-05-03 14:07:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0167910447761193) internal successors, (3234), 1072 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3234 transitions. [2021-05-03 14:07:56,939 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3234 transitions. Word has length 20 [2021-05-03 14:07:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:56,939 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3234 transitions. [2021-05-03 14:07:56,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3234 transitions. [2021-05-03 14:07:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:07:56,940 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:56,940 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:57,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9021,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:57,141 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:57,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:57,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1002672236, now seen corresponding path program 233 times [2021-05-03 14:07:57,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:57,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897390994] [2021-05-03 14:07:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:57,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897390994] [2021-05-03 14:07:57,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881849130] [2021-05-03 14:07:57,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:57,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:07:57,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:57,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:07:57,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:57,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:57,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:07:57,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:57,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:57,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:57,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:07:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:57,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:57,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:07:57,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383718864] [2021-05-03 14:07:57,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:07:57,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:57,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:07:57,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:57,824 INFO L87 Difference]: Start difference. First operand 1073 states and 3234 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:58,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:58,313 INFO L93 Difference]: Finished difference Result 1158 states and 3390 transitions. [2021-05-03 14:07:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:07:58,321 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:07:58,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:58,322 INFO L225 Difference]: With dead ends: 1158 [2021-05-03 14:07:58,322 INFO L226 Difference]: Without dead ends: 1153 [2021-05-03 14:07:58,323 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 367.2ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:07:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-05-03 14:07:58,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1073. [2021-05-03 14:07:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0167910447761193) internal successors, (3234), 1072 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3234 transitions. [2021-05-03 14:07:58,334 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3234 transitions. Word has length 20 [2021-05-03 14:07:58,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:58,334 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3234 transitions. [2021-05-03 14:07:58,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3234 transitions. [2021-05-03 14:07:58,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:07:58,335 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:58,335 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:58,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9134,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:58,536 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:58,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:58,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1802890064, now seen corresponding path program 234 times [2021-05-03 14:07:58,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:58,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869963090] [2021-05-03 14:07:58,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:58,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869963090] [2021-05-03 14:07:58,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47580690] [2021-05-03 14:07:58,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:58,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:07:58,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:58,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:07:58,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:59,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:59,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:07:59,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:59,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:59,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:59,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:07:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:59,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:59,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:07:59,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110121420] [2021-05-03 14:07:59,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:07:59,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:59,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:07:59,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:07:59,370 INFO L87 Difference]: Start difference. First operand 1073 states and 3234 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:00,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:00,128 INFO L93 Difference]: Finished difference Result 1194 states and 3443 transitions. [2021-05-03 14:08:00,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:08:00,129 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:00,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:00,130 INFO L225 Difference]: With dead ends: 1194 [2021-05-03 14:08:00,130 INFO L226 Difference]: Without dead ends: 1177 [2021-05-03 14:08:00,130 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 480.6ms TimeCoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:08:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-05-03 14:08:00,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1073. [2021-05-03 14:08:00,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0065298507462686) internal successors, (3223), 1072 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3223 transitions. [2021-05-03 14:08:00,140 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3223 transitions. Word has length 20 [2021-05-03 14:08:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:00,140 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3223 transitions. [2021-05-03 14:08:00,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:00,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3223 transitions. [2021-05-03 14:08:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:00,141 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:00,141 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:00,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9229,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:00,342 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:00,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:00,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1600755601, now seen corresponding path program 235 times [2021-05-03 14:08:00,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:00,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991607624] [2021-05-03 14:08:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:00,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991607624] [2021-05-03 14:08:00,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832185909] [2021-05-03 14:08:00,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:08:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:00,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:08:00,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:00,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:00,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:08:00,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622877360] [2021-05-03 14:08:00,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:08:00,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:00,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:08:00,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:08:00,457 INFO L87 Difference]: Start difference. First operand 1073 states and 3223 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:00,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:00,554 INFO L93 Difference]: Finished difference Result 1408 states and 3883 transitions. [2021-05-03 14:08:00,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:08:00,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:00,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:00,557 INFO L225 Difference]: With dead ends: 1408 [2021-05-03 14:08:00,557 INFO L226 Difference]: Without dead ends: 1408 [2021-05-03 14:08:00,557 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:08:00,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-05-03 14:08:00,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1089. [2021-05-03 14:08:00,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1088 states have (on average 3.011029411764706) internal successors, (3276), 1088 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 3276 transitions. [2021-05-03 14:08:00,569 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 3276 transitions. Word has length 20 [2021-05-03 14:08:00,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:00,569 INFO L480 AbstractCegarLoop]: Abstraction has 1089 states and 3276 transitions. [2021-05-03 14:08:00,569 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) [2021-05-03 14:08:00,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 3276 transitions. [2021-05-03 14:08:00,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:00,570 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:00,570 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:00,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9389 [2021-05-03 14:08:00,771 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:00,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:00,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1418991852, now seen corresponding path program 236 times [2021-05-03 14:08:00,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:00,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053649700] [2021-05-03 14:08:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:00,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053649700] [2021-05-03 14:08:00,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51999396] [2021-05-03 14:08:00,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:00,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:00,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:00,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:00,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:01,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:01,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:01,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:01,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:01,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:01,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:01,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:01,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:08:01,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117473711] [2021-05-03 14:08:01,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:08:01,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:01,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:08:01,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:08:01,586 INFO L87 Difference]: Start difference. First operand 1089 states and 3276 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:02,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:02,055 INFO L93 Difference]: Finished difference Result 1220 states and 3550 transitions. [2021-05-03 14:08:02,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:08:02,055 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:02,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:02,057 INFO L225 Difference]: With dead ends: 1220 [2021-05-03 14:08:02,057 INFO L226 Difference]: Without dead ends: 1215 [2021-05-03 14:08:02,057 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:08:02,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-05-03 14:08:02,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1090. [2021-05-03 14:08:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.0110192837465566) internal successors, (3279), 1089 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3279 transitions. [2021-05-03 14:08:02,075 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3279 transitions. Word has length 20 [2021-05-03 14:08:02,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:02,075 INFO L480 AbstractCegarLoop]: Abstraction has 1090 states and 3279 transitions. [2021-05-03 14:08:02,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3279 transitions. [2021-05-03 14:08:02,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:02,076 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:02,076 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:02,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9390,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:02,277 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2138611179, now seen corresponding path program 237 times [2021-05-03 14:08:02,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:02,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711281684] [2021-05-03 14:08:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:02,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711281684] [2021-05-03 14:08:02,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6215293] [2021-05-03 14:08:02,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:02,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:08:02,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:02,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:08:02,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:02,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:02,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:08:02,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741801515] [2021-05-03 14:08:02,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:08:02,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:02,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:08:02,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:08:02,397 INFO L87 Difference]: Start difference. First operand 1090 states and 3279 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:02,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:02,517 INFO L93 Difference]: Finished difference Result 1834 states and 5241 transitions. [2021-05-03 14:08:02,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:08:02,518 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:02,520 INFO L225 Difference]: With dead ends: 1834 [2021-05-03 14:08:02,520 INFO L226 Difference]: Without dead ends: 1834 [2021-05-03 14:08:02,520 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:08:02,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-05-03 14:08:02,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1516. [2021-05-03 14:08:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.0613861386138614) internal successors, (4638), 1515 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 4638 transitions. [2021-05-03 14:08:02,537 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 4638 transitions. Word has length 20 [2021-05-03 14:08:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:02,538 INFO L480 AbstractCegarLoop]: Abstraction has 1516 states and 4638 transitions. [2021-05-03 14:08:02,538 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) [2021-05-03 14:08:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 4638 transitions. [2021-05-03 14:08:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:02,539 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:02,539 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:02,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9525,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:02,740 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:02,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:02,740 INFO L82 PathProgramCache]: Analyzing trace with hash 67979132, now seen corresponding path program 238 times [2021-05-03 14:08:02,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:02,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977908547] [2021-05-03 14:08:02,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:08:02,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977908547] [2021-05-03 14:08:02,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930499789] [2021-05-03 14:08:02,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:02,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:08:02,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:02,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:02,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:03,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:03,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:03,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:03,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:03,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:03,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:03,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:03,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-05-03 14:08:03,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281318861] [2021-05-03 14:08:03,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:08:03,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:03,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:08:03,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:08:03,782 INFO L87 Difference]: Start difference. First operand 1516 states and 4638 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:04,184 INFO L93 Difference]: Finished difference Result 1539 states and 4677 transitions. [2021-05-03 14:08:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:08:04,185 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:04,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:04,186 INFO L225 Difference]: With dead ends: 1539 [2021-05-03 14:08:04,186 INFO L226 Difference]: Without dead ends: 1524 [2021-05-03 14:08:04,187 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 475.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:08:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-05-03 14:08:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1514. [2021-05-03 14:08:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.060806345009914) internal successors, (4631), 1513 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4631 transitions. [2021-05-03 14:08:04,202 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4631 transitions. Word has length 20 [2021-05-03 14:08:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:04,202 INFO L480 AbstractCegarLoop]: Abstraction has 1514 states and 4631 transitions. [2021-05-03 14:08:04,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4631 transitions. [2021-05-03 14:08:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:04,204 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:04,204 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:04,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9526,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:04,404 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:04,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:04,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1559917892, now seen corresponding path program 239 times [2021-05-03 14:08:04,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:04,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175927984] [2021-05-03 14:08:04,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:04,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175927984] [2021-05-03 14:08:04,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049018277] [2021-05-03 14:08:04,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:04,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:08:04,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:04,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:04,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:05,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:05,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:05,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:05,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:05,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:05,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:05,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:05,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:08:05,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481383199] [2021-05-03 14:08:05,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:08:05,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:05,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:08:05,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:08:05,635 INFO L87 Difference]: Start difference. First operand 1514 states and 4631 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:06,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:06,132 INFO L93 Difference]: Finished difference Result 1653 states and 4904 transitions. [2021-05-03 14:08:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:08:06,133 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:06,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:06,135 INFO L225 Difference]: With dead ends: 1653 [2021-05-03 14:08:06,135 INFO L226 Difference]: Without dead ends: 1640 [2021-05-03 14:08:06,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 571.0ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:08:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-05-03 14:08:06,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1514. [2021-05-03 14:08:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.056179775280899) internal successors, (4624), 1513 states have internal predecessors, (4624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:06,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4624 transitions. [2021-05-03 14:08:06,150 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4624 transitions. Word has length 20 [2021-05-03 14:08:06,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:06,150 INFO L480 AbstractCegarLoop]: Abstraction has 1514 states and 4624 transitions. [2021-05-03 14:08:06,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:06,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4624 transitions. [2021-05-03 14:08:06,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:06,152 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:06,152 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:06,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9747,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:06,352 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:06,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:06,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1232376888, now seen corresponding path program 240 times [2021-05-03 14:08:06,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:06,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239631557] [2021-05-03 14:08:06,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:06,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239631557] [2021-05-03 14:08:06,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079462439] [2021-05-03 14:08:06,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:06,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:08:06,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:06,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:06,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:06,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:07,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:07,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:07,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:07,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:07,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:07,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:08:07,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974392211] [2021-05-03 14:08:07,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:08:07,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:07,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:08:07,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:08:07,021 INFO L87 Difference]: Start difference. First operand 1514 states and 4624 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:07,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:07,443 INFO L93 Difference]: Finished difference Result 1609 states and 4809 transitions. [2021-05-03 14:08:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:08:07,444 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:07,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:07,446 INFO L225 Difference]: With dead ends: 1609 [2021-05-03 14:08:07,446 INFO L226 Difference]: Without dead ends: 1604 [2021-05-03 14:08:07,446 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 367.7ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:08:07,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-05-03 14:08:07,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1517. [2021-05-03 14:08:07,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.058047493403694) internal successors, (4636), 1516 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 4636 transitions. [2021-05-03 14:08:07,463 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 4636 transitions. Word has length 20 [2021-05-03 14:08:07,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:07,463 INFO L480 AbstractCegarLoop]: Abstraction has 1517 states and 4636 transitions. [2021-05-03 14:08:07,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:07,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 4636 transitions. [2021-05-03 14:08:07,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:07,464 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:07,464 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:07,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10017 [2021-05-03 14:08:07,665 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:07,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:07,665 INFO L82 PathProgramCache]: Analyzing trace with hash -493102570, now seen corresponding path program 241 times [2021-05-03 14:08:07,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:07,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051890585] [2021-05-03 14:08:07,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:07,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051890585] [2021-05-03 14:08:07,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260037884] [2021-05-03 14:08:07,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:07,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:07,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:08,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:08,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:08,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:08,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:08,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:08,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:08,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:08,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:08:08,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711394865] [2021-05-03 14:08:08,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:08:08,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:08,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:08:08,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:08:08,694 INFO L87 Difference]: Start difference. First operand 1517 states and 4636 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:09,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:09,173 INFO L93 Difference]: Finished difference Result 1614 states and 4819 transitions. [2021-05-03 14:08:09,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:08:09,173 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:09,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:09,175 INFO L225 Difference]: With dead ends: 1614 [2021-05-03 14:08:09,175 INFO L226 Difference]: Without dead ends: 1605 [2021-05-03 14:08:09,175 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 397.8ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:08:09,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-05-03 14:08:09,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1515. [2021-05-03 14:08:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.058784676354029) internal successors, (4631), 1514 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4631 transitions. [2021-05-03 14:08:09,192 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4631 transitions. Word has length 20 [2021-05-03 14:08:09,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:09,192 INFO L480 AbstractCegarLoop]: Abstraction has 1515 states and 4631 transitions. [2021-05-03 14:08:09,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:09,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4631 transitions. [2021-05-03 14:08:09,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:09,193 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:09,194 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:09,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10115,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:09,394 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:09,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:09,394 INFO L82 PathProgramCache]: Analyzing trace with hash 996302426, now seen corresponding path program 242 times [2021-05-03 14:08:09,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:09,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340258153] [2021-05-03 14:08:09,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:09,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340258153] [2021-05-03 14:08:09,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481163210] [2021-05-03 14:08:09,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:09,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:09,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:09,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:09,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:09,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:09,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:10,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:10,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:10,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:10,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:10,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:10,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:08:10,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797944946] [2021-05-03 14:08:10,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:08:10,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:10,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:08:10,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:08:10,451 INFO L87 Difference]: Start difference. First operand 1515 states and 4631 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:10,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:10,775 INFO L93 Difference]: Finished difference Result 1606 states and 4806 transitions. [2021-05-03 14:08:10,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:08:10,775 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:10,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:10,777 INFO L225 Difference]: With dead ends: 1606 [2021-05-03 14:08:10,777 INFO L226 Difference]: Without dead ends: 1601 [2021-05-03 14:08:10,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:08:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-05-03 14:08:10,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1515. [2021-05-03 14:08:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.058784676354029) internal successors, (4631), 1514 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:10,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4631 transitions. [2021-05-03 14:08:10,793 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4631 transitions. Word has length 20 [2021-05-03 14:08:10,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:10,793 INFO L480 AbstractCegarLoop]: Abstraction has 1515 states and 4631 transitions. [2021-05-03 14:08:10,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:10,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4631 transitions. [2021-05-03 14:08:10,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:10,794 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:10,794 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:10,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10330 [2021-05-03 14:08:10,997 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:10,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:10,997 INFO L82 PathProgramCache]: Analyzing trace with hash -76782954, now seen corresponding path program 243 times [2021-05-03 14:08:10,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:10,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710110601] [2021-05-03 14:08:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:11,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710110601] [2021-05-03 14:08:11,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811358386] [2021-05-03 14:08:11,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:11,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:08:11,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:11,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:11,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:11,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:11,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:11,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:11,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:11,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:11,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:11,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:11,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:08:11,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822753893] [2021-05-03 14:08:11,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:08:11,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:11,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:08:11,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:08:11,642 INFO L87 Difference]: Start difference. First operand 1515 states and 4631 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:12,136 INFO L93 Difference]: Finished difference Result 1644 states and 4888 transitions. [2021-05-03 14:08:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:08:12,137 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:12,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:12,139 INFO L225 Difference]: With dead ends: 1644 [2021-05-03 14:08:12,139 INFO L226 Difference]: Without dead ends: 1631 [2021-05-03 14:08:12,139 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 402.3ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:08:12,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-05-03 14:08:12,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1515. [2021-05-03 14:08:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.0574636723910174) internal successors, (4629), 1514 states have internal predecessors, (4629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:12,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4629 transitions. [2021-05-03 14:08:12,155 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4629 transitions. Word has length 20 [2021-05-03 14:08:12,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:12,155 INFO L480 AbstractCegarLoop]: Abstraction has 1515 states and 4629 transitions. [2021-05-03 14:08:12,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:12,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4629 transitions. [2021-05-03 14:08:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:12,157 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:12,157 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:12,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10592,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:12,357 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:12,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:12,358 INFO L82 PathProgramCache]: Analyzing trace with hash 642836373, now seen corresponding path program 244 times [2021-05-03 14:08:12,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:12,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249599604] [2021-05-03 14:08:12,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:12,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249599604] [2021-05-03 14:08:12,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208012298] [2021-05-03 14:08:12,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:12,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:08:12,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:12,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:08:12,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:12,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:12,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:08:12,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701019568] [2021-05-03 14:08:12,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:08:12,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:12,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:08:12,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:08:12,502 INFO L87 Difference]: Start difference. First operand 1515 states and 4629 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:12,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:12,615 INFO L93 Difference]: Finished difference Result 1871 states and 5337 transitions. [2021-05-03 14:08:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:08:12,616 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 [2021-05-03 14:08:12,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:12,618 INFO L225 Difference]: With dead ends: 1871 [2021-05-03 14:08:12,618 INFO L226 Difference]: Without dead ends: 1871 [2021-05-03 14:08:12,619 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:08:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-05-03 14:08:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1073. [2021-05-03 14:08:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0) internal successors, (3216), 1072 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:12,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3216 transitions. [2021-05-03 14:08:12,632 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3216 transitions. Word has length 20 [2021-05-03 14:08:12,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:12,632 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3216 transitions. [2021-05-03 14:08:12,632 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) [2021-05-03 14:08:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3216 transitions. [2021-05-03 14:08:12,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:12,633 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:12,633 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:12,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10658,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:12,834 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:12,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:12,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1017308634, now seen corresponding path program 245 times [2021-05-03 14:08:12,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:12,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665117706] [2021-05-03 14:08:12,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:12,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665117706] [2021-05-03 14:08:12,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624789218] [2021-05-03 14:08:12,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:12,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:08:12,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:12,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:12,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:13,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:13,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:13,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:13,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:13,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:13,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:13,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:13,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:08:13,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254533561] [2021-05-03 14:08:13,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:08:13,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:13,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:08:13,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:08:13,764 INFO L87 Difference]: Start difference. First operand 1073 states and 3216 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:14,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:14,368 INFO L93 Difference]: Finished difference Result 1252 states and 3621 transitions. [2021-05-03 14:08:14,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:08:14,369 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:14,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:14,370 INFO L225 Difference]: With dead ends: 1252 [2021-05-03 14:08:14,370 INFO L226 Difference]: Without dead ends: 1247 [2021-05-03 14:08:14,370 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 472.4ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:08:14,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-05-03 14:08:14,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1073. [2021-05-03 14:08:14,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0) internal successors, (3216), 1072 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3216 transitions. [2021-05-03 14:08:14,381 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3216 transitions. Word has length 20 [2021-05-03 14:08:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:14,381 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 3216 transitions. [2021-05-03 14:08:14,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:14,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3216 transitions. [2021-05-03 14:08:14,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:14,382 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:14,382 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:14,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10659 [2021-05-03 14:08:14,583 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:14,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:14,583 INFO L82 PathProgramCache]: Analyzing trace with hash 136490107, now seen corresponding path program 246 times [2021-05-03 14:08:14,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:14,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377373586] [2021-05-03 14:08:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:14,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377373586] [2021-05-03 14:08:14,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056710870] [2021-05-03 14:08:14,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:14,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:08:14,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:14,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:08:14,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:14,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:14,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:08:14,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107518811] [2021-05-03 14:08:14,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:08:14,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:14,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:08:14,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:08:14,713 INFO L87 Difference]: Start difference. First operand 1073 states and 3216 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:14,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:14,873 INFO L93 Difference]: Finished difference Result 1821 states and 5166 transitions. [2021-05-03 14:08:14,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:08:14,874 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 [2021-05-03 14:08:14,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:14,876 INFO L225 Difference]: With dead ends: 1821 [2021-05-03 14:08:14,876 INFO L226 Difference]: Without dead ends: 1821 [2021-05-03 14:08:14,876 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:08:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-05-03 14:08:14,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1372. [2021-05-03 14:08:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.047410649161196) internal successors, (4178), 1371 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:14,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4178 transitions. [2021-05-03 14:08:14,892 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4178 transitions. Word has length 20 [2021-05-03 14:08:14,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:14,892 INFO L480 AbstractCegarLoop]: Abstraction has 1372 states and 4178 transitions. [2021-05-03 14:08:14,892 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) [2021-05-03 14:08:14,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4178 transitions. [2021-05-03 14:08:14,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:14,893 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:14,893 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:15,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10850 [2021-05-03 14:08:15,094 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:15,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:15,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1110932366, now seen corresponding path program 247 times [2021-05-03 14:08:15,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:15,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237444084] [2021-05-03 14:08:15,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:15,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237444084] [2021-05-03 14:08:15,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019761702] [2021-05-03 14:08:15,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:15,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:15,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:15,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:15,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:15,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:15,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:15,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:15,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:15,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:15,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:08:15,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6491743] [2021-05-03 14:08:15,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:08:15,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:15,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:08:15,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:08:15,886 INFO L87 Difference]: Start difference. First operand 1372 states and 4178 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:16,298 INFO L93 Difference]: Finished difference Result 1418 states and 4257 transitions. [2021-05-03 14:08:16,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:08:16,298 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:16,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:16,300 INFO L225 Difference]: With dead ends: 1418 [2021-05-03 14:08:16,300 INFO L226 Difference]: Without dead ends: 1386 [2021-05-03 14:08:16,300 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:08:16,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-05-03 14:08:16,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1374. [2021-05-03 14:08:16,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0458849235251275) internal successors, (4182), 1373 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:16,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4182 transitions. [2021-05-03 14:08:16,314 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4182 transitions. Word has length 20 [2021-05-03 14:08:16,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:16,315 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4182 transitions. [2021-05-03 14:08:16,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:16,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4182 transitions. [2021-05-03 14:08:16,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:16,316 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:16,316 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:16,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10851 [2021-05-03 14:08:16,520 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:16,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:16,520 INFO L82 PathProgramCache]: Analyzing trace with hash -519119568, now seen corresponding path program 248 times [2021-05-03 14:08:16,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:16,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75063478] [2021-05-03 14:08:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:16,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75063478] [2021-05-03 14:08:16,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347885553] [2021-05-03 14:08:16,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:16,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:16,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:16,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:16,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:16,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:16,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:17,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:17,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:17,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:17,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:17,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:17,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:08:17,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917700193] [2021-05-03 14:08:17,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:08:17,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:17,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:08:17,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:08:17,193 INFO L87 Difference]: Start difference. First operand 1374 states and 4182 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:17,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:17,621 INFO L93 Difference]: Finished difference Result 1463 states and 4324 transitions. [2021-05-03 14:08:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:08:17,622 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:17,624 INFO L225 Difference]: With dead ends: 1463 [2021-05-03 14:08:17,624 INFO L226 Difference]: Without dead ends: 1440 [2021-05-03 14:08:17,624 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 389.7ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:08:17,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-05-03 14:08:17,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1374. [2021-05-03 14:08:17,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0356882738528768) internal successors, (4168), 1373 states have internal predecessors, (4168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4168 transitions. [2021-05-03 14:08:17,640 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4168 transitions. Word has length 20 [2021-05-03 14:08:17,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:17,640 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4168 transitions. [2021-05-03 14:08:17,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:17,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4168 transitions. [2021-05-03 14:08:17,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:17,642 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:17,643 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:17,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10991 [2021-05-03 14:08:17,844 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:17,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:17,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1592204948, now seen corresponding path program 249 times [2021-05-03 14:08:17,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:17,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637430477] [2021-05-03 14:08:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:17,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637430477] [2021-05-03 14:08:17,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605263292] [2021-05-03 14:08:17,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:17,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:08:17,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:17,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:17,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:18,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:18,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:18,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:18,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:18,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:18,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:18,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:18,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:08:18,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251768274] [2021-05-03 14:08:18,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:08:18,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:18,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:08:18,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:08:18,606 INFO L87 Difference]: Start difference. First operand 1374 states and 4168 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:19,232 INFO L93 Difference]: Finished difference Result 1493 states and 4350 transitions. [2021-05-03 14:08:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:08:19,233 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:19,234 INFO L225 Difference]: With dead ends: 1493 [2021-05-03 14:08:19,235 INFO L226 Difference]: Without dead ends: 1464 [2021-05-03 14:08:19,235 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 521.0ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:08:19,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-05-03 14:08:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1374. [2021-05-03 14:08:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0276766205389656) internal successors, (4157), 1373 states have internal predecessors, (4157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4157 transitions. [2021-05-03 14:08:19,249 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4157 transitions. Word has length 20 [2021-05-03 14:08:19,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:19,249 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4157 transitions. [2021-05-03 14:08:19,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:19,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4157 transitions. [2021-05-03 14:08:19,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:19,250 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:19,250 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:19,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11088,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:19,451 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:19,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:19,451 INFO L82 PathProgramCache]: Analyzing trace with hash -498113360, now seen corresponding path program 250 times [2021-05-03 14:08:19,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:19,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248585329] [2021-05-03 14:08:19,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:19,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248585329] [2021-05-03 14:08:19,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104281185] [2021-05-03 14:08:19,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:19,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:08:19,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:19,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:19,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:19,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:19,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:20,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:20,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:20,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:20,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:20,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:20,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:08:20,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29878202] [2021-05-03 14:08:20,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:08:20,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:20,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:08:20,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:08:20,140 INFO L87 Difference]: Start difference. First operand 1374 states and 4157 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:20,540 INFO L93 Difference]: Finished difference Result 1523 states and 4457 transitions. [2021-05-03 14:08:20,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:08:20,541 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:20,542 INFO L225 Difference]: With dead ends: 1523 [2021-05-03 14:08:20,542 INFO L226 Difference]: Without dead ends: 1508 [2021-05-03 14:08:20,543 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 453.5ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:08:20,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-05-03 14:08:20,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1374. [2021-05-03 14:08:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0269482884195194) internal successors, (4156), 1373 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:20,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4156 transitions. [2021-05-03 14:08:20,556 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4156 transitions. Word has length 20 [2021-05-03 14:08:20,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:20,556 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4156 transitions. [2021-05-03 14:08:20,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:20,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4156 transitions. [2021-05-03 14:08:20,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:20,558 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:20,558 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:20,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11190 [2021-05-03 14:08:20,758 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:20,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:20,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1134580214, now seen corresponding path program 251 times [2021-05-03 14:08:20,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:20,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817597214] [2021-05-03 14:08:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:20,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817597214] [2021-05-03 14:08:20,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218141960] [2021-05-03 14:08:20,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:20,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:08:20,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:20,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:20,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:21,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:21,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:21,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:21,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:21,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:21,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:21,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:21,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:08:21,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927344910] [2021-05-03 14:08:21,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:08:21,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:21,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:08:21,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:08:21,917 INFO L87 Difference]: Start difference. First operand 1374 states and 4156 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:22,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:22,613 INFO L93 Difference]: Finished difference Result 1525 states and 4427 transitions. [2021-05-03 14:08:22,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:08:22,614 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:22,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:22,616 INFO L225 Difference]: With dead ends: 1525 [2021-05-03 14:08:22,616 INFO L226 Difference]: Without dead ends: 1490 [2021-05-03 14:08:22,616 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 536.8ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:08:22,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-05-03 14:08:22,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1366. [2021-05-03 14:08:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.0278388278388277) internal successors, (4133), 1365 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4133 transitions. [2021-05-03 14:08:22,630 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4133 transitions. Word has length 20 [2021-05-03 14:08:22,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:22,630 INFO L480 AbstractCegarLoop]: Abstraction has 1366 states and 4133 transitions. [2021-05-03 14:08:22,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:22,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4133 transitions. [2021-05-03 14:08:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:22,631 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:22,631 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:22,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11275,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:22,832 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:22,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:22,832 INFO L82 PathProgramCache]: Analyzing trace with hash 2107998158, now seen corresponding path program 252 times [2021-05-03 14:08:22,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:22,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276175406] [2021-05-03 14:08:22,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:22,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276175406] [2021-05-03 14:08:22,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377144276] [2021-05-03 14:08:22,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:22,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:08:22,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:22,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:22,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:23,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:23,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:23,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:23,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:23,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:23,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:23,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:23,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:08:23,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19554155] [2021-05-03 14:08:23,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:08:23,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:23,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:08:23,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:08:23,495 INFO L87 Difference]: Start difference. First operand 1366 states and 4133 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:24,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:24,022 INFO L93 Difference]: Finished difference Result 1431 states and 4256 transitions. [2021-05-03 14:08:24,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:08:24,023 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:24,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:24,025 INFO L225 Difference]: With dead ends: 1431 [2021-05-03 14:08:24,025 INFO L226 Difference]: Without dead ends: 1422 [2021-05-03 14:08:24,025 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 378.6ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:08:24,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-05-03 14:08:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1364. [2021-05-03 14:08:24,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 3.0234776228906823) internal successors, (4121), 1363 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 4121 transitions. [2021-05-03 14:08:24,039 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 4121 transitions. Word has length 20 [2021-05-03 14:08:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:24,039 INFO L480 AbstractCegarLoop]: Abstraction has 1364 states and 4121 transitions. [2021-05-03 14:08:24,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 4121 transitions. [2021-05-03 14:08:24,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:24,040 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:24,040 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:24,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11571 [2021-05-03 14:08:24,243 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:24,243 INFO L82 PathProgramCache]: Analyzing trace with hash 382518700, now seen corresponding path program 253 times [2021-05-03 14:08:24,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:24,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962516041] [2021-05-03 14:08:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:24,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962516041] [2021-05-03 14:08:24,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644993394] [2021-05-03 14:08:24,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:24,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:24,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:24,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:24,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:25,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:25,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:25,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:25,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:25,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:25,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:08:25,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330669223] [2021-05-03 14:08:25,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:08:25,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:25,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:08:25,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:08:25,048 INFO L87 Difference]: Start difference. First operand 1364 states and 4121 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:25,561 INFO L93 Difference]: Finished difference Result 1429 states and 4239 transitions. [2021-05-03 14:08:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:08:25,562 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:25,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:25,563 INFO L225 Difference]: With dead ends: 1429 [2021-05-03 14:08:25,563 INFO L226 Difference]: Without dead ends: 1424 [2021-05-03 14:08:25,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 395.3ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:08:25,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-05-03 14:08:25,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1364. [2021-05-03 14:08:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 3.0234776228906823) internal successors, (4121), 1363 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 4121 transitions. [2021-05-03 14:08:25,578 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 4121 transitions. Word has length 20 [2021-05-03 14:08:25,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:25,578 INFO L480 AbstractCegarLoop]: Abstraction has 1364 states and 4121 transitions. [2021-05-03 14:08:25,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:25,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 4121 transitions. [2021-05-03 14:08:25,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:25,580 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:25,580 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:25,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11659,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:25,780 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:25,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1871923696, now seen corresponding path program 254 times [2021-05-03 14:08:25,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:25,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460795382] [2021-05-03 14:08:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:25,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460795382] [2021-05-03 14:08:25,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710616293] [2021-05-03 14:08:25,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:25,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:25,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:25,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:25,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:26,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:26,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:26,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:26,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:26,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:26,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:26,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:26,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:08:26,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070998090] [2021-05-03 14:08:26,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:08:26,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:26,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:08:26,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:08:26,962 INFO L87 Difference]: Start difference. First operand 1364 states and 4121 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:27,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:27,494 INFO L93 Difference]: Finished difference Result 1463 states and 4289 transitions. [2021-05-03 14:08:27,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:08:27,494 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:27,496 INFO L225 Difference]: With dead ends: 1463 [2021-05-03 14:08:27,496 INFO L226 Difference]: Without dead ends: 1440 [2021-05-03 14:08:27,496 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 486.8ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:08:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-05-03 14:08:27,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1366. [2021-05-03 14:08:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.0065934065934066) internal successors, (4104), 1365 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4104 transitions. [2021-05-03 14:08:27,510 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4104 transitions. Word has length 20 [2021-05-03 14:08:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:27,510 INFO L480 AbstractCegarLoop]: Abstraction has 1366 states and 4104 transitions. [2021-05-03 14:08:27,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4104 transitions. [2021-05-03 14:08:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:27,511 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:27,511 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:27,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11809 [2021-05-03 14:08:27,713 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:27,713 INFO L82 PathProgramCache]: Analyzing trace with hash 980602065, now seen corresponding path program 255 times [2021-05-03 14:08:27,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:27,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333668844] [2021-05-03 14:08:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:27,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333668844] [2021-05-03 14:08:27,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898442538] [2021-05-03 14:08:27,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:27,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:08:27,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:27,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:08:27,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:27,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:27,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:08:27,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849209913] [2021-05-03 14:08:27,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:08:27,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:27,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:08:27,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:08:27,828 INFO L87 Difference]: Start difference. First operand 1366 states and 4104 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:27,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:27,924 INFO L93 Difference]: Finished difference Result 1698 states and 4827 transitions. [2021-05-03 14:08:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:08:27,925 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:27,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:27,927 INFO L225 Difference]: With dead ends: 1698 [2021-05-03 14:08:27,927 INFO L226 Difference]: Without dead ends: 1698 [2021-05-03 14:08:27,927 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:08:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-05-03 14:08:27,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1390. [2021-05-03 14:08:27,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.0057595392368612) internal successors, (4175), 1389 states have internal predecessors, (4175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:27,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4175 transitions. [2021-05-03 14:08:27,944 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4175 transitions. Word has length 20 [2021-05-03 14:08:27,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:27,944 INFO L480 AbstractCegarLoop]: Abstraction has 1390 states and 4175 transitions. [2021-05-03 14:08:27,944 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) [2021-05-03 14:08:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4175 transitions. [2021-05-03 14:08:27,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:27,946 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:27,946 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:28,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12111,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:28,146 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:28,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:28,146 INFO L82 PathProgramCache]: Analyzing trace with hash 798838316, now seen corresponding path program 256 times [2021-05-03 14:08:28,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:28,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050349003] [2021-05-03 14:08:28,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:28,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050349003] [2021-05-03 14:08:28,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973924199] [2021-05-03 14:08:28,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:28,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:08:28,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:28,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:28,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:28,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:28,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:28,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:28,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:28,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:28,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:28,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:28,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:08:28,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564229329] [2021-05-03 14:08:28,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:08:28,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:28,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:08:28,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:08:28,975 INFO L87 Difference]: Start difference. First operand 1390 states and 4175 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:29,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:29,438 INFO L93 Difference]: Finished difference Result 1514 states and 4411 transitions. [2021-05-03 14:08:29,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:08:29,438 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:29,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:29,440 INFO L225 Difference]: With dead ends: 1514 [2021-05-03 14:08:29,440 INFO L226 Difference]: Without dead ends: 1509 [2021-05-03 14:08:29,440 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:08:29,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-05-03 14:08:29,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1390. [2021-05-03 14:08:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.0057595392368612) internal successors, (4175), 1389 states have internal predecessors, (4175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4175 transitions. [2021-05-03 14:08:29,454 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4175 transitions. Word has length 20 [2021-05-03 14:08:29,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:29,454 INFO L480 AbstractCegarLoop]: Abstraction has 1390 states and 4175 transitions. [2021-05-03 14:08:29,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:29,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4175 transitions. [2021-05-03 14:08:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:29,455 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:29,455 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:29,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12112 [2021-05-03 14:08:29,656 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:29,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1892929904, now seen corresponding path program 257 times [2021-05-03 14:08:29,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:29,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278447911] [2021-05-03 14:08:29,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:29,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278447911] [2021-05-03 14:08:29,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680593951] [2021-05-03 14:08:29,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:29,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:08:29,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:29,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:29,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:30,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:30,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:30,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:30,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:30,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:30,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:30,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:30,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:08:30,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471988058] [2021-05-03 14:08:30,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:08:30,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:30,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:08:30,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:08:30,646 INFO L87 Difference]: Start difference. First operand 1390 states and 4175 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:31,169 INFO L93 Difference]: Finished difference Result 1554 states and 4501 transitions. [2021-05-03 14:08:31,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:08:31,169 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:31,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:31,171 INFO L225 Difference]: With dead ends: 1554 [2021-05-03 14:08:31,171 INFO L226 Difference]: Without dead ends: 1539 [2021-05-03 14:08:31,172 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 463.2ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:08:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-05-03 14:08:31,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1390. [2021-05-03 14:08:31,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.0043196544276456) internal successors, (4173), 1389 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:31,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4173 transitions. [2021-05-03 14:08:31,186 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4173 transitions. Word has length 20 [2021-05-03 14:08:31,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:31,187 INFO L480 AbstractCegarLoop]: Abstraction has 1390 states and 4173 transitions. [2021-05-03 14:08:31,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:31,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4173 transitions. [2021-05-03 14:08:31,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:31,188 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:31,188 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:31,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12270,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:31,388 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:31,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1012111377, now seen corresponding path program 258 times [2021-05-03 14:08:31,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:31,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112183922] [2021-05-03 14:08:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:31,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112183922] [2021-05-03 14:08:31,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774858594] [2021-05-03 14:08:31,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:31,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:08:31,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:31,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:08:31,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:31,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:31,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:08:31,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132618327] [2021-05-03 14:08:31,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:08:31,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:31,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:08:31,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:08:31,514 INFO L87 Difference]: Start difference. First operand 1390 states and 4173 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:31,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:31,644 INFO L93 Difference]: Finished difference Result 2615 states and 7716 transitions. [2021-05-03 14:08:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:08:31,645 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 [2021-05-03 14:08:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:31,648 INFO L225 Difference]: With dead ends: 2615 [2021-05-03 14:08:31,648 INFO L226 Difference]: Without dead ends: 2615 [2021-05-03 14:08:31,648 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:08:31,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2021-05-03 14:08:31,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2343. [2021-05-03 14:08:31,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 3.0572160546541416) internal successors, (7160), 2342 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:31,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 7160 transitions. [2021-05-03 14:08:31,674 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 7160 transitions. Word has length 20 [2021-05-03 14:08:31,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:31,674 INFO L480 AbstractCegarLoop]: Abstraction has 2343 states and 7160 transitions. [2021-05-03 14:08:31,674 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) [2021-05-03 14:08:31,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 7160 transitions. [2021-05-03 14:08:31,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:31,676 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:31,676 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:31,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12443 [2021-05-03 14:08:31,877 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:31,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:31,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1450030764, now seen corresponding path program 259 times [2021-05-03 14:08:31,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:31,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871620702] [2021-05-03 14:08:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:31,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871620702] [2021-05-03 14:08:31,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229429923] [2021-05-03 14:08:31,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:32,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:32,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:32,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:32,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:32,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:32,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:32,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:32,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:32,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:32,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:08:32,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785336008] [2021-05-03 14:08:32,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:08:32,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:32,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:08:32,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:08:32,810 INFO L87 Difference]: Start difference. First operand 2343 states and 7160 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:33,455 INFO L93 Difference]: Finished difference Result 2710 states and 8145 transitions. [2021-05-03 14:08:33,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:08:33,456 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:33,459 INFO L225 Difference]: With dead ends: 2710 [2021-05-03 14:08:33,459 INFO L226 Difference]: Without dead ends: 2705 [2021-05-03 14:08:33,459 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 508.4ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:08:33,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2021-05-03 14:08:33,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2343. [2021-05-03 14:08:33,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 3.0572160546541416) internal successors, (7160), 2342 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:33,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 7160 transitions. [2021-05-03 14:08:33,487 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 7160 transitions. Word has length 20 [2021-05-03 14:08:33,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:33,487 INFO L480 AbstractCegarLoop]: Abstraction has 2343 states and 7160 transitions. [2021-05-03 14:08:33,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:33,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 7160 transitions. [2021-05-03 14:08:33,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:33,489 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:33,489 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:33,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12444 [2021-05-03 14:08:33,689 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:33,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:33,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1799720981, now seen corresponding path program 260 times [2021-05-03 14:08:33,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:33,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426567485] [2021-05-03 14:08:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:33,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426567485] [2021-05-03 14:08:33,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550902482] [2021-05-03 14:08:33,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:33,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:33,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:33,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:08:33,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:33,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:33,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:08:33,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848875860] [2021-05-03 14:08:33,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:08:33,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:33,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:08:33,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:08:33,814 INFO L87 Difference]: Start difference. First operand 2343 states and 7160 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:34,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:34,042 INFO L93 Difference]: Finished difference Result 3338 states and 9885 transitions. [2021-05-03 14:08:34,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:08:34,042 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 [2021-05-03 14:08:34,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:34,046 INFO L225 Difference]: With dead ends: 3338 [2021-05-03 14:08:34,046 INFO L226 Difference]: Without dead ends: 3338 [2021-05-03 14:08:34,046 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:08:34,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-05-03 14:08:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2994. [2021-05-03 14:08:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2993 states have (on average 3.05913798864016) internal successors, (9156), 2993 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:34,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 9156 transitions. [2021-05-03 14:08:34,082 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 9156 transitions. Word has length 20 [2021-05-03 14:08:34,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:34,082 INFO L480 AbstractCegarLoop]: Abstraction has 2994 states and 9156 transitions. [2021-05-03 14:08:34,082 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) [2021-05-03 14:08:34,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 9156 transitions. [2021-05-03 14:08:34,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:34,084 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:34,084 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:34,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12631 [2021-05-03 14:08:34,285 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:34,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:34,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1377490808, now seen corresponding path program 261 times [2021-05-03 14:08:34,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:34,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538095686] [2021-05-03 14:08:34,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:34,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538095686] [2021-05-03 14:08:34,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766758355] [2021-05-03 14:08:34,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:34,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:08:34,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:34,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:34,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:34,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:34,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:34,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:34,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:34,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:34,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:34,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:34,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:08:34,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310998942] [2021-05-03 14:08:34,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:08:34,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:34,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:08:34,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:08:34,993 INFO L87 Difference]: Start difference. First operand 2994 states and 9156 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:35,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:35,543 INFO L93 Difference]: Finished difference Result 3056 states and 9275 transitions. [2021-05-03 14:08:35,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:08:35,544 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:35,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:35,548 INFO L225 Difference]: With dead ends: 3056 [2021-05-03 14:08:35,548 INFO L226 Difference]: Without dead ends: 3044 [2021-05-03 14:08:35,548 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:08:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2021-05-03 14:08:35,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 2990. [2021-05-03 14:08:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2989 states have (on average 3.0595516895282704) internal successors, (9145), 2989 states have internal predecessors, (9145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:35,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 9145 transitions. [2021-05-03 14:08:35,584 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 9145 transitions. Word has length 20 [2021-05-03 14:08:35,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:35,584 INFO L480 AbstractCegarLoop]: Abstraction has 2990 states and 9145 transitions. [2021-05-03 14:08:35,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:35,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 9145 transitions. [2021-05-03 14:08:35,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:35,586 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:35,587 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:35,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12632 [2021-05-03 14:08:35,787 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:35,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:35,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1065396758, now seen corresponding path program 262 times [2021-05-03 14:08:35,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:35,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386375894] [2021-05-03 14:08:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:35,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386375894] [2021-05-03 14:08:35,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688740446] [2021-05-03 14:08:35,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:35,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:08:35,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:35,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:35,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:36,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:36,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:36,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:36,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:36,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:36,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:36,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:36,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:08:36,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441930669] [2021-05-03 14:08:36,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:08:36,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:36,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:08:36,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:08:36,523 INFO L87 Difference]: Start difference. First operand 2990 states and 9145 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:36,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:36,997 INFO L93 Difference]: Finished difference Result 3075 states and 9279 transitions. [2021-05-03 14:08:36,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:08:36,998 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:36,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:37,002 INFO L225 Difference]: With dead ends: 3075 [2021-05-03 14:08:37,002 INFO L226 Difference]: Without dead ends: 3062 [2021-05-03 14:08:37,002 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 418.1ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:08:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-05-03 14:08:37,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 2992. [2021-05-03 14:08:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2992 states, 2991 states have (on average 3.051822133065864) internal successors, (9128), 2991 states have internal predecessors, (9128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 9128 transitions. [2021-05-03 14:08:37,042 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 9128 transitions. Word has length 20 [2021-05-03 14:08:37,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:37,042 INFO L480 AbstractCegarLoop]: Abstraction has 2992 states and 9128 transitions. [2021-05-03 14:08:37,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:37,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 9128 transitions. [2021-05-03 14:08:37,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:37,045 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:37,045 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:37,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12720 [2021-05-03 14:08:37,245 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:37,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:37,246 INFO L82 PathProgramCache]: Analyzing trace with hash -2135478950, now seen corresponding path program 263 times [2021-05-03 14:08:37,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:37,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988429630] [2021-05-03 14:08:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:37,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988429630] [2021-05-03 14:08:37,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10372424] [2021-05-03 14:08:37,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:37,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:08:37,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:37,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:37,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:37,840 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-05-03 14:08:37,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:37,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:38,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:38,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:38,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:38,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:38,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:38,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:08:38,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989563745] [2021-05-03 14:08:38,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:08:38,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:38,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:08:38,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:08:38,175 INFO L87 Difference]: Start difference. First operand 2992 states and 9128 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:38,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:38,634 INFO L93 Difference]: Finished difference Result 3101 states and 9293 transitions. [2021-05-03 14:08:38,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:08:38,634 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:38,638 INFO L225 Difference]: With dead ends: 3101 [2021-05-03 14:08:38,638 INFO L226 Difference]: Without dead ends: 3076 [2021-05-03 14:08:38,638 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 513.1ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:08:38,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-05-03 14:08:38,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2982. [2021-05-03 14:08:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0385776585038577) internal successors, (9058), 2981 states have internal predecessors, (9058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:38,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9058 transitions. [2021-05-03 14:08:38,675 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9058 transitions. Word has length 20 [2021-05-03 14:08:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:38,675 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9058 transitions. [2021-05-03 14:08:38,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:38,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9058 transitions. [2021-05-03 14:08:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:38,677 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:38,677 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:38,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12832 [2021-05-03 14:08:38,878 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:38,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:38,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1716589206, now seen corresponding path program 264 times [2021-05-03 14:08:38,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:38,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187008119] [2021-05-03 14:08:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:39,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187008119] [2021-05-03 14:08:39,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517731848] [2021-05-03 14:08:39,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:39,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:08:39,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:39,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:39,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:39,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:39,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:39,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:39,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:39,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:39,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:39,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:39,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:08:39,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753255067] [2021-05-03 14:08:39,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:08:39,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:39,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:08:39,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:08:39,700 INFO L87 Difference]: Start difference. First operand 2982 states and 9058 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:40,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:40,329 INFO L93 Difference]: Finished difference Result 3164 states and 9474 transitions. [2021-05-03 14:08:40,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:08:40,330 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:40,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:40,334 INFO L225 Difference]: With dead ends: 3164 [2021-05-03 14:08:40,334 INFO L226 Difference]: Without dead ends: 3159 [2021-05-03 14:08:40,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 543.1ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:08:40,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2021-05-03 14:08:40,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 2982. [2021-05-03 14:08:40,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0385776585038577) internal successors, (9058), 2981 states have internal predecessors, (9058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9058 transitions. [2021-05-03 14:08:40,369 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9058 transitions. Word has length 20 [2021-05-03 14:08:40,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:40,369 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9058 transitions. [2021-05-03 14:08:40,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:40,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9058 transitions. [2021-05-03 14:08:40,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:40,372 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:40,372 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:40,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12950 [2021-05-03 14:08:40,572 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:40,572 INFO L82 PathProgramCache]: Analyzing trace with hash -72987268, now seen corresponding path program 265 times [2021-05-03 14:08:40,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:40,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541548101] [2021-05-03 14:08:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:40,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541548101] [2021-05-03 14:08:40,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938816136] [2021-05-03 14:08:40,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:40,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:40,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:41,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:41,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:41,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:41,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:41,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:41,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:41,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:41,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:08:41,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234511935] [2021-05-03 14:08:41,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:08:41,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:41,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:08:41,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:08:41,365 INFO L87 Difference]: Start difference. First operand 2982 states and 9058 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:41,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:41,888 INFO L93 Difference]: Finished difference Result 3032 states and 9158 transitions. [2021-05-03 14:08:41,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:08:41,889 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:41,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:41,893 INFO L225 Difference]: With dead ends: 3032 [2021-05-03 14:08:41,893 INFO L226 Difference]: Without dead ends: 3022 [2021-05-03 14:08:41,893 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 404.2ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:08:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-05-03 14:08:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2982. [2021-05-03 14:08:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0385776585038577) internal successors, (9058), 2981 states have internal predecessors, (9058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9058 transitions. [2021-05-03 14:08:41,928 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9058 transitions. Word has length 20 [2021-05-03 14:08:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:41,928 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9058 transitions. [2021-05-03 14:08:41,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9058 transitions. [2021-05-03 14:08:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:41,931 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:41,931 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:42,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13078,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:42,131 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:42,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:42,131 INFO L82 PathProgramCache]: Analyzing trace with hash -834014084, now seen corresponding path program 266 times [2021-05-03 14:08:42,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:42,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145698411] [2021-05-03 14:08:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:42,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145698411] [2021-05-03 14:08:42,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803815763] [2021-05-03 14:08:42,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:42,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:42,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:42,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:42,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:42,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:42,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:43,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:43,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:43,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:43,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:43,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:43,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:08:43,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141753245] [2021-05-03 14:08:43,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:08:43,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:43,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:08:43,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:08:43,047 INFO L87 Difference]: Start difference. First operand 2982 states and 9058 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:43,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:43,687 INFO L93 Difference]: Finished difference Result 3204 states and 9569 transitions. [2021-05-03 14:08:43,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:08:43,688 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:43,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:43,691 INFO L225 Difference]: With dead ends: 3204 [2021-05-03 14:08:43,691 INFO L226 Difference]: Without dead ends: 3187 [2021-05-03 14:08:43,691 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 513.9ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:08:43,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-05-03 14:08:43,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 2982. [2021-05-03 14:08:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:43,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-05-03 14:08:43,723 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-05-03 14:08:43,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:43,723 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-05-03 14:08:43,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:43,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-05-03 14:08:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:43,725 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:43,725 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:43,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13210,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:43,925 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:43,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:43,926 INFO L82 PathProgramCache]: Analyzing trace with hash -812513544, now seen corresponding path program 267 times [2021-05-03 14:08:43,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:43,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554596116] [2021-05-03 14:08:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:44,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554596116] [2021-05-03 14:08:44,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060171474] [2021-05-03 14:08:44,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:44,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:08:44,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:44,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:44,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:44,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:44,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:44,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:44,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:44,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:44,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:44,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:44,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:08:44,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967316444] [2021-05-03 14:08:44,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:08:44,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:44,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:08:44,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:08:44,630 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:45,051 INFO L93 Difference]: Finished difference Result 3020 states and 9115 transitions. [2021-05-03 14:08:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:08:45,052 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:45,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:45,056 INFO L225 Difference]: With dead ends: 3020 [2021-05-03 14:08:45,056 INFO L226 Difference]: Without dead ends: 3015 [2021-05-03 14:08:45,056 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 407.4ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:08:45,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3015 states. [2021-05-03 14:08:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3015 to 2982. [2021-05-03 14:08:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-05-03 14:08:45,093 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-05-03 14:08:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:45,093 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-05-03 14:08:45,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-05-03 14:08:45,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:45,095 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:45,095 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:45,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13353,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:45,296 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:45,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:45,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1756974294, now seen corresponding path program 268 times [2021-05-03 14:08:45,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:45,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585582947] [2021-05-03 14:08:45,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:45,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585582947] [2021-05-03 14:08:45,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547128982] [2021-05-03 14:08:45,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:45,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:08:45,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:45,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:45,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:45,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:45,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:46,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:46,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:46,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:46,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:46,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:46,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:08:46,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737737490] [2021-05-03 14:08:46,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:08:46,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:46,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:08:46,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:08:46,355 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:47,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:47,012 INFO L93 Difference]: Finished difference Result 3037 states and 9140 transitions. [2021-05-03 14:08:47,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:08:47,013 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:47,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:47,017 INFO L225 Difference]: With dead ends: 3037 [2021-05-03 14:08:47,017 INFO L226 Difference]: Without dead ends: 3032 [2021-05-03 14:08:47,017 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 420.0ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:08:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-05-03 14:08:47,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2982. [2021-05-03 14:08:47,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:47,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-05-03 14:08:47,070 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-05-03 14:08:47,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:47,070 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-05-03 14:08:47,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:47,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-05-03 14:08:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:47,073 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:47,073 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:47,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13442,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:47,274 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:47,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:47,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1048588006, now seen corresponding path program 269 times [2021-05-03 14:08:47,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:47,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868989017] [2021-05-03 14:08:47,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:47,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868989017] [2021-05-03 14:08:47,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083171491] [2021-05-03 14:08:47,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:47,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:08:47,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:47,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:47,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:47,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:47,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:48,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:48,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:48,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:48,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:48,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:48,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:08:48,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965291134] [2021-05-03 14:08:48,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:08:48,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:48,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:08:48,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:08:48,023 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:48,486 INFO L93 Difference]: Finished difference Result 3082 states and 9238 transitions. [2021-05-03 14:08:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:08:48,487 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:48,490 INFO L225 Difference]: With dead ends: 3082 [2021-05-03 14:08:48,491 INFO L226 Difference]: Without dead ends: 3077 [2021-05-03 14:08:48,491 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 437.2ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:08:48,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2021-05-03 14:08:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2982. [2021-05-03 14:08:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-05-03 14:08:48,526 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-05-03 14:08:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:48,526 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-05-03 14:08:48,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-05-03 14:08:48,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:48,529 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:48,529 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:48,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13698 [2021-05-03 14:08:48,729 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2121673386, now seen corresponding path program 270 times [2021-05-03 14:08:48,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:48,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82031406] [2021-05-03 14:08:48,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:48,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82031406] [2021-05-03 14:08:48,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054134816] [2021-05-03 14:08:48,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:48,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:08:48,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:48,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:49,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:49,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:49,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:49,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:49,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:49,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:49,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:49,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:08:49,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32596870] [2021-05-03 14:08:49,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:08:49,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:49,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:08:49,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:08:49,436 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:50,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:50,016 INFO L93 Difference]: Finished difference Result 3139 states and 9381 transitions. [2021-05-03 14:08:50,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:08:50,017 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:50,021 INFO L225 Difference]: With dead ends: 3139 [2021-05-03 14:08:50,021 INFO L226 Difference]: Without dead ends: 3126 [2021-05-03 14:08:50,021 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 476.3ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:08:50,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-05-03 14:08:50,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2986. [2021-05-03 14:08:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 3.0268006700167502) internal successors, (9035), 2985 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 9035 transitions. [2021-05-03 14:08:50,057 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 9035 transitions. Word has length 20 [2021-05-03 14:08:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:50,057 INFO L480 AbstractCegarLoop]: Abstraction has 2986 states and 9035 transitions. [2021-05-03 14:08:50,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 9035 transitions. [2021-05-03 14:08:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:50,060 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:50,060 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:50,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13791,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:50,260 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:50,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:50,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1402054059, now seen corresponding path program 271 times [2021-05-03 14:08:50,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:50,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370591427] [2021-05-03 14:08:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:50,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370591427] [2021-05-03 14:08:50,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895211473] [2021-05-03 14:08:50,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:50,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:08:50,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:50,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:50,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:08:50,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403473370] [2021-05-03 14:08:50,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:08:50,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:50,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:08:50,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:08:50,393 INFO L87 Difference]: Start difference. First operand 2986 states and 9035 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:50,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:50,531 INFO L93 Difference]: Finished difference Result 3429 states and 10006 transitions. [2021-05-03 14:08:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:08:50,532 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 [2021-05-03 14:08:50,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:50,536 INFO L225 Difference]: With dead ends: 3429 [2021-05-03 14:08:50,536 INFO L226 Difference]: Without dead ends: 3429 [2021-05-03 14:08:50,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:08:50,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-05-03 14:08:50,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2845. [2021-05-03 14:08:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.9947257383966246) internal successors, (8517), 2844 states have internal predecessors, (8517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 8517 transitions. [2021-05-03 14:08:50,577 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 8517 transitions. Word has length 20 [2021-05-03 14:08:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:50,577 INFO L480 AbstractCegarLoop]: Abstraction has 2845 states and 8517 transitions. [2021-05-03 14:08:50,577 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) [2021-05-03 14:08:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 8517 transitions. [2021-05-03 14:08:50,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:50,580 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:50,580 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:50,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13867 [2021-05-03 14:08:50,780 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:50,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:50,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1027581798, now seen corresponding path program 272 times [2021-05-03 14:08:50,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:50,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705428350] [2021-05-03 14:08:50,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:50,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705428350] [2021-05-03 14:08:50,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485171929] [2021-05-03 14:08:50,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:50,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:50,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:50,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:50,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:51,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:51,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:51,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:51,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:51,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:51,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:51,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:51,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:08:51,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37288829] [2021-05-03 14:08:51,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:08:51,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:51,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:08:51,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:08:51,682 INFO L87 Difference]: Start difference. First operand 2845 states and 8517 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:52,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:52,222 INFO L93 Difference]: Finished difference Result 3008 states and 8868 transitions. [2021-05-03 14:08:52,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:08:52,222 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:52,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:52,226 INFO L225 Difference]: With dead ends: 3008 [2021-05-03 14:08:52,226 INFO L226 Difference]: Without dead ends: 3003 [2021-05-03 14:08:52,226 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 472.8ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:08:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2021-05-03 14:08:52,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2845. [2021-05-03 14:08:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.9947257383966246) internal successors, (8517), 2844 states have internal predecessors, (8517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 8517 transitions. [2021-05-03 14:08:52,260 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 8517 transitions. Word has length 20 [2021-05-03 14:08:52,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:52,260 INFO L480 AbstractCegarLoop]: Abstraction has 2845 states and 8517 transitions. [2021-05-03 14:08:52,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:52,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 8517 transitions. [2021-05-03 14:08:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:52,263 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:52,263 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:52,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13868 [2021-05-03 14:08:52,463 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:52,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:52,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1908400325, now seen corresponding path program 273 times [2021-05-03 14:08:52,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:52,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426785921] [2021-05-03 14:08:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:52,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426785921] [2021-05-03 14:08:52,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885515335] [2021-05-03 14:08:52,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:52,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:08:52,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:52,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:08:52,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:52,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:52,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:08:52,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86322648] [2021-05-03 14:08:52,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:08:52,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:52,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:08:52,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:08:52,598 INFO L87 Difference]: Start difference. First operand 2845 states and 8517 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:52,704 INFO L93 Difference]: Finished difference Result 3840 states and 11378 transitions. [2021-05-03 14:08:52,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:08:52,705 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 [2021-05-03 14:08:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:52,709 INFO L225 Difference]: With dead ends: 3840 [2021-05-03 14:08:52,709 INFO L226 Difference]: Without dead ends: 3840 [2021-05-03 14:08:52,710 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:08:52,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3840 states. [2021-05-03 14:08:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3840 to 3571. [2021-05-03 14:08:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 3.0103641456582633) internal successors, (10747), 3570 states have internal predecessors, (10747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:52,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 10747 transitions. [2021-05-03 14:08:52,755 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 10747 transitions. Word has length 20 [2021-05-03 14:08:52,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:52,755 INFO L480 AbstractCegarLoop]: Abstraction has 3571 states and 10747 transitions. [2021-05-03 14:08:52,755 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) [2021-05-03 14:08:52,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 10747 transitions. [2021-05-03 14:08:52,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:52,757 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:52,757 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:52,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13992,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:52,958 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:52,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:52,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1470480938, now seen corresponding path program 274 times [2021-05-03 14:08:52,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:52,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185249917] [2021-05-03 14:08:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:53,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185249917] [2021-05-03 14:08:53,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637713621] [2021-05-03 14:08:53,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:53,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:08:53,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:53,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:53,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:53,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:53,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:53,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:53,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:53,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:53,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:53,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:53,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:08:53,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797656007] [2021-05-03 14:08:53,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:08:53,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:53,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:08:53,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:08:53,904 INFO L87 Difference]: Start difference. First operand 3571 states and 10747 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:54,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:54,472 INFO L93 Difference]: Finished difference Result 3789 states and 11234 transitions. [2021-05-03 14:08:54,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:08:54,472 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:54,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:54,476 INFO L225 Difference]: With dead ends: 3789 [2021-05-03 14:08:54,476 INFO L226 Difference]: Without dead ends: 3772 [2021-05-03 14:08:54,476 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 527.9ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:08:54,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-05-03 14:08:54,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3571. [2021-05-03 14:08:54,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 3.0095238095238095) internal successors, (10744), 3570 states have internal predecessors, (10744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 10744 transitions. [2021-05-03 14:08:54,518 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 10744 transitions. Word has length 20 [2021-05-03 14:08:54,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:54,518 INFO L480 AbstractCegarLoop]: Abstraction has 3571 states and 10744 transitions. [2021-05-03 14:08:54,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:54,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 10744 transitions. [2021-05-03 14:08:54,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:54,521 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:54,521 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:54,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13993,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:54,721 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:54,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:54,721 INFO L82 PathProgramCache]: Analyzing trace with hash -425265387, now seen corresponding path program 275 times [2021-05-03 14:08:54,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:54,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055313912] [2021-05-03 14:08:54,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:54,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055313912] [2021-05-03 14:08:54,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368108346] [2021-05-03 14:08:54,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:08:54,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:08:54,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:54,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:08:54,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:54,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:54,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:08:54,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660572844] [2021-05-03 14:08:54,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:08:54,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:54,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:08:54,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:08:54,856 INFO L87 Difference]: Start difference. First operand 3571 states and 10744 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:55,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:55,020 INFO L93 Difference]: Finished difference Result 3935 states and 11615 transitions. [2021-05-03 14:08:55,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:08:55,021 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 [2021-05-03 14:08:55,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:55,025 INFO L225 Difference]: With dead ends: 3935 [2021-05-03 14:08:55,025 INFO L226 Difference]: Without dead ends: 3935 [2021-05-03 14:08:55,025 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:08:55,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-05-03 14:08:55,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 3315. [2021-05-03 14:08:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 3.007845503922752) internal successors, (9968), 3314 states have internal predecessors, (9968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:55,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 9968 transitions. [2021-05-03 14:08:55,068 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 9968 transitions. Word has length 20 [2021-05-03 14:08:55,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:55,068 INFO L480 AbstractCegarLoop]: Abstraction has 3315 states and 9968 transitions. [2021-05-03 14:08:55,068 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) [2021-05-03 14:08:55,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 9968 transitions. [2021-05-03 14:08:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:55,070 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:55,070 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:55,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14169 [2021-05-03 14:08:55,271 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:55,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:55,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1979514906, now seen corresponding path program 276 times [2021-05-03 14:08:55,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:55,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648351732] [2021-05-03 14:08:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:55,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648351732] [2021-05-03 14:08:55,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857826433] [2021-05-03 14:08:55,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:55,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:08:55,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:55,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:55,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:55,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:55,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:55,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:55,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:55,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:55,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:56,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:56,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:08:56,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234492020] [2021-05-03 14:08:56,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:08:56,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:56,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:08:56,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:08:56,001 INFO L87 Difference]: Start difference. First operand 3315 states and 9968 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:56,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:56,582 INFO L93 Difference]: Finished difference Result 3697 states and 10990 transitions. [2021-05-03 14:08:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:08:56,583 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:56,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:56,587 INFO L225 Difference]: With dead ends: 3697 [2021-05-03 14:08:56,587 INFO L226 Difference]: Without dead ends: 3692 [2021-05-03 14:08:56,588 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 573.5ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:08:56,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3692 states. [2021-05-03 14:08:56,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3692 to 3315. [2021-05-03 14:08:56,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 3.007845503922752) internal successors, (9968), 3314 states have internal predecessors, (9968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 9968 transitions. [2021-05-03 14:08:56,628 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 9968 transitions. Word has length 20 [2021-05-03 14:08:56,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:56,628 INFO L480 AbstractCegarLoop]: Abstraction has 3315 states and 9968 transitions. [2021-05-03 14:08:56,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 9968 transitions. [2021-05-03 14:08:56,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:56,631 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:56,631 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:56,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14170 [2021-05-03 14:08:56,831 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:56,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:56,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1692722565, now seen corresponding path program 277 times [2021-05-03 14:08:56,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:56,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520629697] [2021-05-03 14:08:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:56,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520629697] [2021-05-03 14:08:56,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930141366] [2021-05-03 14:08:56,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:56,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:08:56,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:56,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:56,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:08:56,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182213228] [2021-05-03 14:08:56,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:08:56,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:56,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:08:56,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:08:56,979 INFO L87 Difference]: Start difference. First operand 3315 states and 9968 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:57,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:57,248 INFO L93 Difference]: Finished difference Result 3902 states and 11479 transitions. [2021-05-03 14:08:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:08:57,249 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 [2021-05-03 14:08:57,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:57,253 INFO L225 Difference]: With dead ends: 3902 [2021-05-03 14:08:57,254 INFO L226 Difference]: Without dead ends: 3902 [2021-05-03 14:08:57,254 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:08:57,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2021-05-03 14:08:57,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3561. [2021-05-03 14:08:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 3.0095505617977527) internal successors, (10714), 3560 states have internal predecessors, (10714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10714 transitions. [2021-05-03 14:08:57,300 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10714 transitions. Word has length 20 [2021-05-03 14:08:57,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:57,300 INFO L480 AbstractCegarLoop]: Abstraction has 3561 states and 10714 transitions. [2021-05-03 14:08:57,300 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) [2021-05-03 14:08:57,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10714 transitions. [2021-05-03 14:08:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:57,303 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:57,303 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:57,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14236 [2021-05-03 14:08:57,504 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:57,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:57,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1050867918, now seen corresponding path program 278 times [2021-05-03 14:08:57,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:57,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800756864] [2021-05-03 14:08:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:57,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800756864] [2021-05-03 14:08:57,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204544371] [2021-05-03 14:08:57,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:08:57,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:57,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:57,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:57,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:58,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:58,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:08:58,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:08:58,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:58,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:08:58,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:08:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:58,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:58,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:08:58,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260211757] [2021-05-03 14:08:58,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:08:58,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:58,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:08:58,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:08:58,253 INFO L87 Difference]: Start difference. First operand 3561 states and 10714 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:59,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:59,026 INFO L93 Difference]: Finished difference Result 3658 states and 10896 transitions. [2021-05-03 14:08:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:08:59,026 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:08:59,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:59,030 INFO L225 Difference]: With dead ends: 3658 [2021-05-03 14:08:59,030 INFO L226 Difference]: Without dead ends: 3642 [2021-05-03 14:08:59,030 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 538.6ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:08:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2021-05-03 14:08:59,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 3561. [2021-05-03 14:08:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 3.0070224719101124) internal successors, (10705), 3560 states have internal predecessors, (10705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:59,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10705 transitions. [2021-05-03 14:08:59,080 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10705 transitions. Word has length 20 [2021-05-03 14:08:59,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:59,080 INFO L480 AbstractCegarLoop]: Abstraction has 3561 states and 10705 transitions. [2021-05-03 14:08:59,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:59,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10705 transitions. [2021-05-03 14:08:59,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:08:59,083 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:59,083 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:59,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14237 [2021-05-03 14:08:59,283 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:59,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:59,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1354204688, now seen corresponding path program 279 times [2021-05-03 14:08:59,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:59,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057504937] [2021-05-03 14:08:59,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:59,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057504937] [2021-05-03 14:08:59,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583355102] [2021-05-03 14:08:59,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:59,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:08:59,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:59,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:08:59,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:59,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:08:59,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:09:00,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:00,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:00,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:00,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:09:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:00,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:00,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:09:00,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380891704] [2021-05-03 14:09:00,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:09:00,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:00,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:09:00,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:00,260 INFO L87 Difference]: Start difference. First operand 3561 states and 10705 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:00,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:00,809 INFO L93 Difference]: Finished difference Result 3663 states and 10877 transitions. [2021-05-03 14:09:00,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:09:00,810 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:00,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:00,815 INFO L225 Difference]: With dead ends: 3663 [2021-05-03 14:09:00,815 INFO L226 Difference]: Without dead ends: 3648 [2021-05-03 14:09:00,815 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 475.3ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:09:00,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3648 states. [2021-05-03 14:09:00,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3648 to 3561. [2021-05-03 14:09:00,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 2.9985955056179776) internal successors, (10675), 3560 states have internal predecessors, (10675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10675 transitions. [2021-05-03 14:09:00,860 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10675 transitions. Word has length 20 [2021-05-03 14:09:00,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:00,860 INFO L480 AbstractCegarLoop]: Abstraction has 3561 states and 10675 transitions. [2021-05-03 14:09:00,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:00,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10675 transitions. [2021-05-03 14:09:00,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:00,864 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:00,864 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:01,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14316,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:01,064 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:01,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:01,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1797103828, now seen corresponding path program 280 times [2021-05-03 14:09:01,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:01,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739086855] [2021-05-03 14:09:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:01,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739086855] [2021-05-03 14:09:01,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58616129] [2021-05-03 14:09:01,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:01,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:01,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:01,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:09:01,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:01,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:01,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:09:01,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:01,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:01,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:01,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:09:01,980 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:01,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:01,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:09:01,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513404155] [2021-05-03 14:09:01,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:09:01,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:01,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:09:01,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:09:01,981 INFO L87 Difference]: Start difference. First operand 3561 states and 10675 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:02,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:02,647 INFO L93 Difference]: Finished difference Result 3677 states and 10845 transitions. [2021-05-03 14:09:02,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:09:02,648 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:02,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:02,652 INFO L225 Difference]: With dead ends: 3677 [2021-05-03 14:09:02,653 INFO L226 Difference]: Without dead ends: 3660 [2021-05-03 14:09:02,653 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 537.0ms TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:09:02,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2021-05-03 14:09:02,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 3561. [2021-05-03 14:09:02,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 2.9856741573033707) internal successors, (10629), 3560 states have internal predecessors, (10629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10629 transitions. [2021-05-03 14:09:02,697 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10629 transitions. Word has length 20 [2021-05-03 14:09:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:02,697 INFO L480 AbstractCegarLoop]: Abstraction has 3561 states and 10629 transitions. [2021-05-03 14:09:02,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10629 transitions. [2021-05-03 14:09:02,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:02,700 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:02,701 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:02,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14493 [2021-05-03 14:09:02,901 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:02,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:02,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1652892016, now seen corresponding path program 281 times [2021-05-03 14:09:02,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:02,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493057306] [2021-05-03 14:09:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:03,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493057306] [2021-05-03 14:09:03,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662023229] [2021-05-03 14:09:03,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:03,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:09:03,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:03,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:09:03,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:03,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:03,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:09:03,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:03,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:03,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:03,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:09:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:03,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:04,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:09:04,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635894429] [2021-05-03 14:09:04,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:09:04,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:04,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:09:04,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:09:04,000 INFO L87 Difference]: Start difference. First operand 3561 states and 10629 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:04,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:04,545 INFO L93 Difference]: Finished difference Result 3666 states and 10779 transitions. [2021-05-03 14:09:04,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:09:04,546 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:04,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:04,551 INFO L225 Difference]: With dead ends: 3666 [2021-05-03 14:09:04,551 INFO L226 Difference]: Without dead ends: 3661 [2021-05-03 14:09:04,551 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 595.7ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:09:04,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-05-03 14:09:04,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 3561. [2021-05-03 14:09:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 2.9856741573033707) internal successors, (10629), 3560 states have internal predecessors, (10629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10629 transitions. [2021-05-03 14:09:04,596 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10629 transitions. Word has length 20 [2021-05-03 14:09:04,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:04,596 INFO L480 AbstractCegarLoop]: Abstraction has 3561 states and 10629 transitions. [2021-05-03 14:09:04,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10629 transitions. [2021-05-03 14:09:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:04,599 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:04,599 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:04,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14646 [2021-05-03 14:09:04,800 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:04,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2136066476, now seen corresponding path program 282 times [2021-05-03 14:09:04,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:04,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088358507] [2021-05-03 14:09:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:04,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088358507] [2021-05-03 14:09:04,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018007612] [2021-05-03 14:09:04,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:09:04,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:09:04,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:04,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:09:04,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:05,342 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-05-03 14:09:05,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:05,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:09:05,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:05,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:05,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:05,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:09:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:05,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:05,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:09:05,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332535507] [2021-05-03 14:09:05,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:09:05,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:05,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:09:05,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:05,518 INFO L87 Difference]: Start difference. First operand 3561 states and 10629 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:06,011 INFO L93 Difference]: Finished difference Result 3633 states and 10776 transitions. [2021-05-03 14:09:06,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:09:06,012 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:06,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:06,016 INFO L225 Difference]: With dead ends: 3633 [2021-05-03 14:09:06,016 INFO L226 Difference]: Without dead ends: 3623 [2021-05-03 14:09:06,016 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 419.4ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:09:06,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-05-03 14:09:06,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3565. [2021-05-03 14:09:06,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.98625140291807) internal successors, (10643), 3564 states have internal predecessors, (10643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10643 transitions. [2021-05-03 14:09:06,062 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10643 transitions. Word has length 20 [2021-05-03 14:09:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:06,062 INFO L480 AbstractCegarLoop]: Abstraction has 3565 states and 10643 transitions. [2021-05-03 14:09:06,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:06,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10643 transitions. [2021-05-03 14:09:06,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:06,065 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:06,065 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:06,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14873 [2021-05-03 14:09:06,266 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:06,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:06,266 INFO L82 PathProgramCache]: Analyzing trace with hash -106398646, now seen corresponding path program 283 times [2021-05-03 14:09:06,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:06,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108233002] [2021-05-03 14:09:06,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:06,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108233002] [2021-05-03 14:09:06,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201857011] [2021-05-03 14:09:06,398 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 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 [2021-05-03 14:09:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:06,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:09:06,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:06,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:06,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:09:07,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:07,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:07,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:07,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:09:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:07,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:07,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:09:07,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432672979] [2021-05-03 14:09:07,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:09:07,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:07,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:09:07,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:09:07,088 INFO L87 Difference]: Start difference. First operand 3565 states and 10643 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:07,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:07,649 INFO L93 Difference]: Finished difference Result 3684 states and 10816 transitions. [2021-05-03 14:09:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:09:07,649 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:07,654 INFO L225 Difference]: With dead ends: 3684 [2021-05-03 14:09:07,654 INFO L226 Difference]: Without dead ends: 3665 [2021-05-03 14:09:07,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 582.0ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:09:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2021-05-03 14:09:07,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3565. [2021-05-03 14:09:07,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.9812008978675646) internal successors, (10625), 3564 states have internal predecessors, (10625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10625 transitions. [2021-05-03 14:09:07,723 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10625 transitions. Word has length 20 [2021-05-03 14:09:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:07,723 INFO L480 AbstractCegarLoop]: Abstraction has 3565 states and 10625 transitions. [2021-05-03 14:09:07,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:07,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10625 transitions. [2021-05-03 14:09:07,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:07,726 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:07,726 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:07,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14953 [2021-05-03 14:09:07,926 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:07,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:07,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1154063090, now seen corresponding path program 284 times [2021-05-03 14:09:07,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:07,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440336145] [2021-05-03 14:09:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:08,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440336145] [2021-05-03 14:09:08,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239854550] [2021-05-03 14:09:08,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:08,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:08,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:08,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:09:08,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:08,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:08,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:09:08,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:08,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:08,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:08,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:09:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:08,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:08,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:09:08,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382299573] [2021-05-03 14:09:08,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:09:08,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:08,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:09:08,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:09:08,808 INFO L87 Difference]: Start difference. First operand 3565 states and 10625 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:09,216 INFO L93 Difference]: Finished difference Result 3609 states and 10719 transitions. [2021-05-03 14:09:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:09:09,217 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:09,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:09,221 INFO L225 Difference]: With dead ends: 3609 [2021-05-03 14:09:09,222 INFO L226 Difference]: Without dead ends: 3604 [2021-05-03 14:09:09,222 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 332.1ms TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:09,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2021-05-03 14:09:09,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 3565. [2021-05-03 14:09:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.9812008978675646) internal successors, (10625), 3564 states have internal predecessors, (10625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10625 transitions. [2021-05-03 14:09:09,268 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10625 transitions. Word has length 20 [2021-05-03 14:09:09,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:09,268 INFO L480 AbstractCegarLoop]: Abstraction has 3565 states and 10625 transitions. [2021-05-03 14:09:09,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10625 transitions. [2021-05-03 14:09:09,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:09,271 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:09,271 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:09,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15083,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:09,472 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:09,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:09,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1415424748, now seen corresponding path program 285 times [2021-05-03 14:09:09,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:09,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398693218] [2021-05-03 14:09:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:09,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398693218] [2021-05-03 14:09:09,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734344668] [2021-05-03 14:09:09,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:09,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:09:09,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:09,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:09:09,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:09,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:09,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:09:10,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:10,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:10,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:10,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:09:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:10,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:10,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:09:10,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283411945] [2021-05-03 14:09:10,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:09:10,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:10,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:09:10,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:09:10,213 INFO L87 Difference]: Start difference. First operand 3565 states and 10625 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:10,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:10,680 INFO L93 Difference]: Finished difference Result 3624 states and 10731 transitions. [2021-05-03 14:09:10,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:09:10,681 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:10,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:10,685 INFO L225 Difference]: With dead ends: 3624 [2021-05-03 14:09:10,685 INFO L226 Difference]: Without dead ends: 3619 [2021-05-03 14:09:10,686 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 425.0ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:09:10,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-05-03 14:09:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3565. [2021-05-03 14:09:10,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.9812008978675646) internal successors, (10625), 3564 states have internal predecessors, (10625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10625 transitions. [2021-05-03 14:09:10,726 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10625 transitions. Word has length 20 [2021-05-03 14:09:10,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:10,726 INFO L480 AbstractCegarLoop]: Abstraction has 3565 states and 10625 transitions. [2021-05-03 14:09:10,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:10,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10625 transitions. [2021-05-03 14:09:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:10,729 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:10,729 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:10,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15250 [2021-05-03 14:09:10,930 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:10,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:10,930 INFO L82 PathProgramCache]: Analyzing trace with hash -220599381, now seen corresponding path program 286 times [2021-05-03 14:09:10,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:10,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879571479] [2021-05-03 14:09:10,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:11,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879571479] [2021-05-03 14:09:11,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002425630] [2021-05-03 14:09:11,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:09:11,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:11,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:11,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:09:11,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:11,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:11,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:09:11,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961491110] [2021-05-03 14:09:11,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:09:11,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:11,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:09:11,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:11,084 INFO L87 Difference]: Start difference. First operand 3565 states and 10625 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:11,247 INFO L93 Difference]: Finished difference Result 4289 states and 12569 transitions. [2021-05-03 14:09:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:09:11,247 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:11,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:11,253 INFO L225 Difference]: With dead ends: 4289 [2021-05-03 14:09:11,253 INFO L226 Difference]: Without dead ends: 4289 [2021-05-03 14:09:11,253 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:11,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2021-05-03 14:09:11,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 3974. [2021-05-03 14:09:11,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 2.9974830103196575) internal successors, (11909), 3973 states have internal predecessors, (11909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:11,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 11909 transitions. [2021-05-03 14:09:11,305 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 11909 transitions. Word has length 20 [2021-05-03 14:09:11,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:11,306 INFO L480 AbstractCegarLoop]: Abstraction has 3974 states and 11909 transitions. [2021-05-03 14:09:11,306 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) [2021-05-03 14:09:11,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 11909 transitions. [2021-05-03 14:09:11,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:11,309 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:11,309 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:11,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15352,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:11,510 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:11,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:11,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1390137552, now seen corresponding path program 287 times [2021-05-03 14:09:11,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:11,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89407017] [2021-05-03 14:09:11,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:11,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89407017] [2021-05-03 14:09:11,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18173140] [2021-05-03 14:09:11,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:11,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:09:11,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:11,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:09:11,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:12,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:12,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:09:12,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:12,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:12,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:12,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:09:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:12,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:12,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:09:12,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810589643] [2021-05-03 14:09:12,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:09:12,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:12,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:09:12,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:09:12,658 INFO L87 Difference]: Start difference. First operand 3974 states and 11909 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:13,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:13,098 INFO L93 Difference]: Finished difference Result 4051 states and 12046 transitions. [2021-05-03 14:09:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:09:13,099 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:13,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:13,103 INFO L225 Difference]: With dead ends: 4051 [2021-05-03 14:09:13,104 INFO L226 Difference]: Without dead ends: 4046 [2021-05-03 14:09:13,104 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 470.2ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:09:13,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2021-05-03 14:09:13,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 3974. [2021-05-03 14:09:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 2.9974830103196575) internal successors, (11909), 3973 states have internal predecessors, (11909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:13,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 11909 transitions. [2021-05-03 14:09:13,161 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 11909 transitions. Word has length 20 [2021-05-03 14:09:13,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:13,161 INFO L480 AbstractCegarLoop]: Abstraction has 3974 states and 11909 transitions. [2021-05-03 14:09:13,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:13,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 11909 transitions. [2021-05-03 14:09:13,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:13,165 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:13,165 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:13,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15353 [2021-05-03 14:09:13,365 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:13,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2013508113, now seen corresponding path program 288 times [2021-05-03 14:09:13,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:13,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872262720] [2021-05-03 14:09:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:13,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872262720] [2021-05-03 14:09:13,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163599963] [2021-05-03 14:09:13,418 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 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 [2021-05-03 14:09:13,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:09:13,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:13,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:09:13,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:13,490 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:13,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:13,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:09:13,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167841884] [2021-05-03 14:09:13,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:09:13,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:13,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:09:13,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:13,491 INFO L87 Difference]: Start difference. First operand 3974 states and 11909 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:13,647 INFO L93 Difference]: Finished difference Result 4435 states and 12955 transitions. [2021-05-03 14:09:13,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:09:13,648 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 [2021-05-03 14:09:13,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:13,653 INFO L225 Difference]: With dead ends: 4435 [2021-05-03 14:09:13,654 INFO L226 Difference]: Without dead ends: 4435 [2021-05-03 14:09:13,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2021-05-03 14:09:13,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 3990. [2021-05-03 14:09:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 3989 states have (on average 2.995487590874906) internal successors, (11949), 3989 states have internal predecessors, (11949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:13,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 11949 transitions. [2021-05-03 14:09:13,710 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 11949 transitions. Word has length 20 [2021-05-03 14:09:13,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:13,710 INFO L480 AbstractCegarLoop]: Abstraction has 3990 states and 11949 transitions. [2021-05-03 14:09:13,710 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) [2021-05-03 14:09:13,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 11949 transitions. [2021-05-03 14:09:13,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:13,714 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:13,714 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:13,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15587,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:13,915 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:13,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:13,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1831744364, now seen corresponding path program 289 times [2021-05-03 14:09:13,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:13,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704858353] [2021-05-03 14:09:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:14,020 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:14,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704858353] [2021-05-03 14:09:14,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004371452] [2021-05-03 14:09:14,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:14,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:09:14,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:14,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:14,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:09:14,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:14,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:14,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:14,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:09:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:14,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:14,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-05-03 14:09:14,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737952931] [2021-05-03 14:09:14,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:09:14,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:09:14,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:09:14,815 INFO L87 Difference]: Start difference. First operand 3990 states and 11949 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:15,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:15,432 INFO L93 Difference]: Finished difference Result 4136 states and 12254 transitions. [2021-05-03 14:09:15,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:09:15,433 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:15,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:15,438 INFO L225 Difference]: With dead ends: 4136 [2021-05-03 14:09:15,438 INFO L226 Difference]: Without dead ends: 4131 [2021-05-03 14:09:15,438 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 474.9ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:09:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2021-05-03 14:09:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 3990. [2021-05-03 14:09:15,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 3989 states have (on average 2.995487590874906) internal successors, (11949), 3989 states have internal predecessors, (11949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:15,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 11949 transitions. [2021-05-03 14:09:15,494 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 11949 transitions. Word has length 20 [2021-05-03 14:09:15,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:15,494 INFO L480 AbstractCegarLoop]: Abstraction has 3990 states and 11949 transitions. [2021-05-03 14:09:15,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:15,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 11949 transitions. [2021-05-03 14:09:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:15,497 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:15,498 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:15,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15588 [2021-05-03 14:09:15,698 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:15,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:15,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1743603605, now seen corresponding path program 290 times [2021-05-03 14:09:15,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:15,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475059014] [2021-05-03 14:09:15,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:15,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475059014] [2021-05-03 14:09:15,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307261462] [2021-05-03 14:09:15,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:15,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:15,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:15,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:09:15,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:15,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:15,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:09:15,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103942384] [2021-05-03 14:09:15,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:09:15,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:15,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:09:15,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:15,831 INFO L87 Difference]: Start difference. First operand 3990 states and 11949 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:15,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:15,990 INFO L93 Difference]: Finished difference Result 5817 states and 17279 transitions. [2021-05-03 14:09:15,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:09:15,991 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 [2021-05-03 14:09:15,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:15,998 INFO L225 Difference]: With dead ends: 5817 [2021-05-03 14:09:15,998 INFO L226 Difference]: Without dead ends: 5817 [2021-05-03 14:09:15,998 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:09:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5817 states. [2021-05-03 14:09:16,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5817 to 5550. [2021-05-03 14:09:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 3.0131555235177507) internal successors, (16720), 5549 states have internal predecessors, (16720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 16720 transitions. [2021-05-03 14:09:16,075 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 16720 transitions. Word has length 20 [2021-05-03 14:09:16,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:16,076 INFO L480 AbstractCegarLoop]: Abstraction has 5550 states and 16720 transitions. [2021-05-03 14:09:16,076 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) [2021-05-03 14:09:16,076 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 16720 transitions. [2021-05-03 14:09:16,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:16,080 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:16,080 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:16,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15746,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:16,281 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:16,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:16,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1369131344, now seen corresponding path program 291 times [2021-05-03 14:09:16,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:16,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069723795] [2021-05-03 14:09:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:16,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069723795] [2021-05-03 14:09:16,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143739551] [2021-05-03 14:09:16,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:16,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:09:16,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:16,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:09:16,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:16,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:16,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:09:17,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:17,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:17,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:17,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:09:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:17,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:17,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:09:17,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350661926] [2021-05-03 14:09:17,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:09:17,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:17,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:09:17,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:17,024 INFO L87 Difference]: Start difference. First operand 5550 states and 16720 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:17,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:17,709 INFO L93 Difference]: Finished difference Result 5762 states and 17201 transitions. [2021-05-03 14:09:17,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:09:17,710 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:17,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:17,718 INFO L225 Difference]: With dead ends: 5762 [2021-05-03 14:09:17,718 INFO L226 Difference]: Without dead ends: 5747 [2021-05-03 14:09:17,718 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 537.9ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:09:17,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2021-05-03 14:09:17,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5546. [2021-05-03 14:09:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5546 states, 5545 states have (on average 3.012082957619477) internal successors, (16702), 5545 states have internal predecessors, (16702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5546 states to 5546 states and 16702 transitions. [2021-05-03 14:09:17,793 INFO L78 Accepts]: Start accepts. Automaton has 5546 states and 16702 transitions. Word has length 20 [2021-05-03 14:09:17,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:17,793 INFO L480 AbstractCegarLoop]: Abstraction has 5546 states and 16702 transitions. [2021-05-03 14:09:17,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:17,793 INFO L276 IsEmpty]: Start isEmpty. Operand 5546 states and 16702 transitions. [2021-05-03 14:09:17,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:17,797 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:17,798 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:17,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15747 [2021-05-03 14:09:17,998 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:17,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:17,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2045017425, now seen corresponding path program 292 times [2021-05-03 14:09:17,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:17,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17659128] [2021-05-03 14:09:17,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:18,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17659128] [2021-05-03 14:09:18,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980132716] [2021-05-03 14:09:18,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:18,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:18,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:18,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:09:18,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:18,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:18,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:09:18,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899100949] [2021-05-03 14:09:18,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:18,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:18,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:18,127 INFO L87 Difference]: Start difference. First operand 5546 states and 16702 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:18,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:18,290 INFO L93 Difference]: Finished difference Result 5777 states and 17109 transitions. [2021-05-03 14:09:18,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:09:18,291 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:18,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:18,299 INFO L225 Difference]: With dead ends: 5777 [2021-05-03 14:09:18,299 INFO L226 Difference]: Without dead ends: 5777 [2021-05-03 14:09:18,299 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:09:18,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5777 states. [2021-05-03 14:09:18,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5777 to 5282. [2021-05-03 14:09:18,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5281 states have (on average 2.9988638515432684) internal successors, (15837), 5281 states have internal predecessors, (15837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 15837 transitions. [2021-05-03 14:09:18,388 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 15837 transitions. Word has length 20 [2021-05-03 14:09:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:18,388 INFO L480 AbstractCegarLoop]: Abstraction has 5282 states and 15837 transitions. [2021-05-03 14:09:18,388 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) [2021-05-03 14:09:18,388 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 15837 transitions. [2021-05-03 14:09:18,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:18,394 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:18,394 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:18,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15835 [2021-05-03 14:09:18,604 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:18,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:18,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1812030484, now seen corresponding path program 293 times [2021-05-03 14:09:18,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:18,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389594348] [2021-05-03 14:09:18,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:18,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389594348] [2021-05-03 14:09:18,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110570052] [2021-05-03 14:09:18,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:18,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:09:18,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:18,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:09:18,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:19,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:19,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:09:19,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:19,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:19,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:19,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:09:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:19,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:19,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 14:09:19,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523640364] [2021-05-03 14:09:19,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:09:19,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:19,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:09:19,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:19,427 INFO L87 Difference]: Start difference. First operand 5282 states and 15837 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:19,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:19,987 INFO L93 Difference]: Finished difference Result 5451 states and 16210 transitions. [2021-05-03 14:09:19,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:09:19,988 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:19,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:19,993 INFO L225 Difference]: With dead ends: 5451 [2021-05-03 14:09:19,993 INFO L226 Difference]: Without dead ends: 5446 [2021-05-03 14:09:19,994 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 526.5ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:09:19,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5446 states. [2021-05-03 14:09:20,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5446 to 5282. [2021-05-03 14:09:20,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5281 states have (on average 2.9988638515432684) internal successors, (15837), 5281 states have internal predecessors, (15837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 15837 transitions. [2021-05-03 14:09:20,098 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 15837 transitions. Word has length 20 [2021-05-03 14:09:20,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:20,099 INFO L480 AbstractCegarLoop]: Abstraction has 5282 states and 15837 transitions. [2021-05-03 14:09:20,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 15837 transitions. [2021-05-03 14:09:20,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:20,102 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:20,102 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:20,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15836 [2021-05-03 14:09:20,302 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:20,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:20,303 INFO L82 PathProgramCache]: Analyzing trace with hash -766814933, now seen corresponding path program 294 times [2021-05-03 14:09:20,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:20,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226181182] [2021-05-03 14:09:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:20,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226181182] [2021-05-03 14:09:20,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943706360] [2021-05-03 14:09:20,371 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 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 [2021-05-03 14:09:20,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:09:20,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:20,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:09:20,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:20,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:20,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:09:20,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265892033] [2021-05-03 14:09:20,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:20,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:20,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:20,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:20,446 INFO L87 Difference]: Start difference. First operand 5282 states and 15837 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:20,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:20,574 INFO L93 Difference]: Finished difference Result 5596 states and 16637 transitions. [2021-05-03 14:09:20,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:09:20,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:20,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:20,580 INFO L225 Difference]: With dead ends: 5596 [2021-05-03 14:09:20,580 INFO L226 Difference]: Without dead ends: 5596 [2021-05-03 14:09:20,581 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:20,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5596 states. [2021-05-03 14:09:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5596 to 5450. [2021-05-03 14:09:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5450 states, 5449 states have (on average 2.998715360616627) internal successors, (16340), 5449 states have internal predecessors, (16340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5450 states to 5450 states and 16340 transitions. [2021-05-03 14:09:20,643 INFO L78 Accepts]: Start accepts. Automaton has 5450 states and 16340 transitions. Word has length 20 [2021-05-03 14:09:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:20,643 INFO L480 AbstractCegarLoop]: Abstraction has 5450 states and 16340 transitions. [2021-05-03 14:09:20,643 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) [2021-05-03 14:09:20,643 INFO L276 IsEmpty]: Start isEmpty. Operand 5450 states and 16340 transitions. [2021-05-03 14:09:20,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:20,647 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:20,647 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:20,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15951 [2021-05-03 14:09:20,847 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:20,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:20,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1637965360, now seen corresponding path program 295 times [2021-05-03 14:09:20,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:20,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410409269] [2021-05-03 14:09:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:20,980 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:20,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410409269] [2021-05-03 14:09:20,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722097659] [2021-05-03 14:09:20,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:21,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:09:21,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:21,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:21,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:09:21,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:21,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:21,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:21,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:09:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:21,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:21,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:09:21,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915421152] [2021-05-03 14:09:21,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:09:21,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:21,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:09:21,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:09:21,681 INFO L87 Difference]: Start difference. First operand 5450 states and 16340 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:22,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:22,316 INFO L93 Difference]: Finished difference Result 5569 states and 16513 transitions. [2021-05-03 14:09:22,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:09:22,317 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:22,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:22,325 INFO L225 Difference]: With dead ends: 5569 [2021-05-03 14:09:22,325 INFO L226 Difference]: Without dead ends: 5550 [2021-05-03 14:09:22,325 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 591.8ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:09:22,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2021-05-03 14:09:22,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 5450. [2021-05-03 14:09:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5450 states, 5449 states have (on average 2.9981648008808954) internal successors, (16337), 5449 states have internal predecessors, (16337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:22,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5450 states to 5450 states and 16337 transitions. [2021-05-03 14:09:22,402 INFO L78 Accepts]: Start accepts. Automaton has 5450 states and 16337 transitions. Word has length 20 [2021-05-03 14:09:22,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:22,403 INFO L480 AbstractCegarLoop]: Abstraction has 5450 states and 16337 transitions. [2021-05-03 14:09:22,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:22,403 INFO L276 IsEmpty]: Start isEmpty. Operand 5450 states and 16337 transitions. [2021-05-03 14:09:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:22,407 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:22,407 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:22,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15952 [2021-05-03 14:09:22,608 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:22,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:22,608 INFO L82 PathProgramCache]: Analyzing trace with hash -2034272111, now seen corresponding path program 296 times [2021-05-03 14:09:22,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:22,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541657397] [2021-05-03 14:09:22,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:22,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541657397] [2021-05-03 14:09:22,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883513723] [2021-05-03 14:09:22,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:22,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:22,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:22,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:09:22,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:22,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:22,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:09:22,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132503163] [2021-05-03 14:09:22,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:22,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:22,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:22,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:22,807 INFO L87 Difference]: Start difference. First operand 5450 states and 16337 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:23,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:23,058 INFO L93 Difference]: Finished difference Result 5644 states and 16739 transitions. [2021-05-03 14:09:23,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:09:23,059 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:23,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:23,067 INFO L225 Difference]: With dead ends: 5644 [2021-05-03 14:09:23,067 INFO L226 Difference]: Without dead ends: 5644 [2021-05-03 14:09:23,067 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 230.0ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:09:23,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5644 states. [2021-05-03 14:09:23,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5644 to 5491. [2021-05-03 14:09:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5491 states, 5490 states have (on average 2.9981785063752278) internal successors, (16460), 5490 states have internal predecessors, (16460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:23,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5491 states to 5491 states and 16460 transitions. [2021-05-03 14:09:23,172 INFO L78 Accepts]: Start accepts. Automaton has 5491 states and 16460 transitions. Word has length 20 [2021-05-03 14:09:23,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:23,173 INFO L480 AbstractCegarLoop]: Abstraction has 5491 states and 16460 transitions. [2021-05-03 14:09:23,173 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) [2021-05-03 14:09:23,173 INFO L276 IsEmpty]: Start isEmpty. Operand 5491 states and 16460 transitions. [2021-05-03 14:09:23,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:23,179 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:23,179 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:23,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16053,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:23,385 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:23,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:23,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1213654124, now seen corresponding path program 297 times [2021-05-03 14:09:23,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:23,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910666153] [2021-05-03 14:09:23,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:23,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910666153] [2021-05-03 14:09:23,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297034927] [2021-05-03 14:09:23,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:23,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:09:23,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:23,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 14:09:23,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:24,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:24,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-05-03 14:09:24,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:09:24,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:09:24,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:09:24,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-05-03 14:09:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:24,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:24,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 14:09:24,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484560225] [2021-05-03 14:09:24,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:09:24,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:24,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:09:24,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:09:24,445 INFO L87 Difference]: Start difference. First operand 5491 states and 16460 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:25,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:25,123 INFO L93 Difference]: Finished difference Result 7043 states and 21060 transitions. [2021-05-03 14:09:25,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:09:25,124 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:25,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:25,133 INFO L225 Difference]: With dead ends: 7043 [2021-05-03 14:09:25,133 INFO L226 Difference]: Without dead ends: 7038 [2021-05-03 14:09:25,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 696.3ms TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:09:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2021-05-03 14:09:25,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 5493. [2021-05-03 14:09:25,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 5492 states have (on average 2.997632920611799) internal successors, (16463), 5492 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:25,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 16463 transitions. [2021-05-03 14:09:25,229 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 16463 transitions. Word has length 20 [2021-05-03 14:09:25,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:25,229 INFO L480 AbstractCegarLoop]: Abstraction has 5493 states and 16463 transitions. [2021-05-03 14:09:25,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:25,229 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 16463 transitions. [2021-05-03 14:09:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:09:25,234 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:25,234 INFO L551 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:25,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16054 [2021-05-03 14:09:25,434 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:25,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1624228331, now seen corresponding path program 298 times [2021-05-03 14:09:25,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:25,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115392444] [2021-05-03 14:09:25,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:25,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115392444] [2021-05-03 14:09:25,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306490806] [2021-05-03 14:09:25,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:25,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:25,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:25,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 14:09:25,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:25,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:25,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:09:25,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714988210] [2021-05-03 14:09:25,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:25,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:25,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:25,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:25,595 INFO L87 Difference]: Start difference. First operand 5493 states and 16463 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:25,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:25,891 INFO L93 Difference]: Finished difference Result 5812 states and 17186 transitions. [2021-05-03 14:09:25,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:09:25,891 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:09:25,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:25,899 INFO L225 Difference]: With dead ends: 5812 [2021-05-03 14:09:25,899 INFO L226 Difference]: Without dead ends: 5812 [2021-05-03 14:09:25,899 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:09:25,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2021-05-03 14:09:25,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 5528. [2021-05-03 14:09:25,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5528 states, 5527 states have (on average 2.99764791025873) internal successors, (16568), 5527 states have internal predecessors, (16568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5528 states to 5528 states and 16568 transitions. [2021-05-03 14:09:25,993 INFO L78 Accepts]: Start accepts. Automaton has 5528 states and 16568 transitions. Word has length 20 [2021-05-03 14:09:25,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:25,993 INFO L480 AbstractCegarLoop]: Abstraction has 5528 states and 16568 transitions. [2021-05-03 14:09:25,993 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) [2021-05-03 14:09:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 5528 states and 16568 transitions. [2021-05-03 14:09:25,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:25,997 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:25,997 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:26,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16227,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:26,207 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:26,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:26,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1322257352, now seen corresponding path program 299 times [2021-05-03 14:09:26,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:26,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396025960] [2021-05-03 14:09:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:26,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396025960] [2021-05-03 14:09:26,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963575983] [2021-05-03 14:09:26,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:26,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:09:26,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:26,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:26,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:26,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:26,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:09:26,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135592321] [2021-05-03 14:09:26,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:26,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:26,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:26,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:26,371 INFO L87 Difference]: Start difference. First operand 5528 states and 16568 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:26,572 INFO L93 Difference]: Finished difference Result 5709 states and 16848 transitions. [2021-05-03 14:09:26,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:09:26,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:26,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:26,580 INFO L225 Difference]: With dead ends: 5709 [2021-05-03 14:09:26,581 INFO L226 Difference]: Without dead ends: 5703 [2021-05-03 14:09:26,581 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 173.1ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:09:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2021-05-03 14:09:26,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 5519. [2021-05-03 14:09:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5519 states, 5518 states have (on average 2.996737948532077) internal successors, (16536), 5518 states have internal predecessors, (16536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5519 states to 5519 states and 16536 transitions. [2021-05-03 14:09:26,666 INFO L78 Accepts]: Start accepts. Automaton has 5519 states and 16536 transitions. Word has length 21 [2021-05-03 14:09:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:26,666 INFO L480 AbstractCegarLoop]: Abstraction has 5519 states and 16536 transitions. [2021-05-03 14:09:26,666 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) [2021-05-03 14:09:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 5519 states and 16536 transitions. [2021-05-03 14:09:26,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:26,671 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:26,671 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:26,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16228,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:26,872 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:26,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:26,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1554817325, now seen corresponding path program 300 times [2021-05-03 14:09:26,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:26,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433800965] [2021-05-03 14:09:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:26,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433800965] [2021-05-03 14:09:26,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884346339] [2021-05-03 14:09:26,966 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 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 [2021-05-03 14:09:26,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:09:26,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:26,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:26,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:27,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:27,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:09:27,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923679273] [2021-05-03 14:09:27,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:27,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:27,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:27,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:27,040 INFO L87 Difference]: Start difference. First operand 5519 states and 16536 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:27,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:27,339 INFO L93 Difference]: Finished difference Result 5835 states and 17177 transitions. [2021-05-03 14:09:27,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:09:27,340 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:27,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:27,347 INFO L225 Difference]: With dead ends: 5835 [2021-05-03 14:09:27,347 INFO L226 Difference]: Without dead ends: 5826 [2021-05-03 14:09:27,348 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:09:27,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-05-03 14:09:27,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 5556. [2021-05-03 14:09:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5556 states, 5555 states have (on average 2.996759675967597) internal successors, (16647), 5555 states have internal predecessors, (16647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:27,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5556 states to 5556 states and 16647 transitions. [2021-05-03 14:09:27,433 INFO L78 Accepts]: Start accepts. Automaton has 5556 states and 16647 transitions. Word has length 21 [2021-05-03 14:09:27,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:27,433 INFO L480 AbstractCegarLoop]: Abstraction has 5556 states and 16647 transitions. [2021-05-03 14:09:27,433 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) [2021-05-03 14:09:27,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5556 states and 16647 transitions. [2021-05-03 14:09:27,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:27,438 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:27,438 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:27,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16229 [2021-05-03 14:09:27,638 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:27,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:27,639 INFO L82 PathProgramCache]: Analyzing trace with hash -395399322, now seen corresponding path program 301 times [2021-05-03 14:09:27,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:27,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089699690] [2021-05-03 14:09:27,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:27,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089699690] [2021-05-03 14:09:27,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809237068] [2021-05-03 14:09:27,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:27,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:27,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:27,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:27,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:09:27,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385874416] [2021-05-03 14:09:27,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:09:27,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:27,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:09:27,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:27,793 INFO L87 Difference]: Start difference. First operand 5556 states and 16647 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:27,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:27,981 INFO L93 Difference]: Finished difference Result 5621 states and 16745 transitions. [2021-05-03 14:09:27,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:09:27,982 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:27,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:27,988 INFO L225 Difference]: With dead ends: 5621 [2021-05-03 14:09:27,988 INFO L226 Difference]: Without dead ends: 5617 [2021-05-03 14:09:27,988 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:27,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2021-05-03 14:09:28,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 5556. [2021-05-03 14:09:28,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5556 states, 5555 states have (on average 2.9962196219621964) internal successors, (16644), 5555 states have internal predecessors, (16644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:28,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5556 states to 5556 states and 16644 transitions. [2021-05-03 14:09:28,061 INFO L78 Accepts]: Start accepts. Automaton has 5556 states and 16644 transitions. Word has length 21 [2021-05-03 14:09:28,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:28,062 INFO L480 AbstractCegarLoop]: Abstraction has 5556 states and 16644 transitions. [2021-05-03 14:09:28,062 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) [2021-05-03 14:09:28,062 INFO L276 IsEmpty]: Start isEmpty. Operand 5556 states and 16644 transitions. [2021-05-03 14:09:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:28,066 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:28,066 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:28,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16230 [2021-05-03 14:09:28,267 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:28,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:28,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2031423451, now seen corresponding path program 302 times [2021-05-03 14:09:28,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:28,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822020065] [2021-05-03 14:09:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:28,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822020065] [2021-05-03 14:09:28,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138615956] [2021-05-03 14:09:28,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:28,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:28,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:28,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:28,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:28,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:28,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:09:28,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894373945] [2021-05-03 14:09:28,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:09:28,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:28,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:09:28,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:28,399 INFO L87 Difference]: Start difference. First operand 5556 states and 16644 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:28,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:28,484 INFO L93 Difference]: Finished difference Result 5973 states and 17563 transitions. [2021-05-03 14:09:28,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:09:28,485 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:28,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:28,491 INFO L225 Difference]: With dead ends: 5973 [2021-05-03 14:09:28,491 INFO L226 Difference]: Without dead ends: 5973 [2021-05-03 14:09:28,491 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5973 states. [2021-05-03 14:09:28,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5973 to 5549. [2021-05-03 14:09:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 2.994953136265321) internal successors, (16616), 5548 states have internal predecessors, (16616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 16616 transitions. [2021-05-03 14:09:28,560 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 16616 transitions. Word has length 21 [2021-05-03 14:09:28,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:28,560 INFO L480 AbstractCegarLoop]: Abstraction has 5549 states and 16616 transitions. [2021-05-03 14:09:28,560 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) [2021-05-03 14:09:28,560 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 16616 transitions. [2021-05-03 14:09:28,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:28,564 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:28,565 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:28,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16231 [2021-05-03 14:09:28,765 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:28,765 INFO L82 PathProgramCache]: Analyzing trace with hash -771235884, now seen corresponding path program 303 times [2021-05-03 14:09:28,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:28,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983521387] [2021-05-03 14:09:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:28,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983521387] [2021-05-03 14:09:28,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85309845] [2021-05-03 14:09:28,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:28,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:09:28,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:28,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:28,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:28,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:28,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:09:28,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537703473] [2021-05-03 14:09:28,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:09:28,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:28,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:09:28,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:28,905 INFO L87 Difference]: Start difference. First operand 5549 states and 16616 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:29,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:29,084 INFO L93 Difference]: Finished difference Result 5638 states and 16779 transitions. [2021-05-03 14:09:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:09:29,085 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:29,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:29,092 INFO L225 Difference]: With dead ends: 5638 [2021-05-03 14:09:29,092 INFO L226 Difference]: Without dead ends: 5634 [2021-05-03 14:09:29,092 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5634 states. [2021-05-03 14:09:29,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5634 to 5549. [2021-05-03 14:09:29,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 2.994592645998558) internal successors, (16614), 5548 states have internal predecessors, (16614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 16614 transitions. [2021-05-03 14:09:29,164 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 16614 transitions. Word has length 21 [2021-05-03 14:09:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:29,164 INFO L480 AbstractCegarLoop]: Abstraction has 5549 states and 16614 transitions. [2021-05-03 14:09:29,164 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) [2021-05-03 14:09:29,164 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 16614 transitions. [2021-05-03 14:09:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:29,169 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:29,169 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:29,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16232 [2021-05-03 14:09:29,369 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:29,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:29,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1662557515, now seen corresponding path program 304 times [2021-05-03 14:09:29,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:29,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463343833] [2021-05-03 14:09:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:29,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463343833] [2021-05-03 14:09:29,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84822170] [2021-05-03 14:09:29,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:29,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:29,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:29,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:29,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:29,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:29,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:09:29,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803264256] [2021-05-03 14:09:29,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:09:29,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:29,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:09:29,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:29,501 INFO L87 Difference]: Start difference. First operand 5549 states and 16614 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:29,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:29,610 INFO L93 Difference]: Finished difference Result 6298 states and 18497 transitions. [2021-05-03 14:09:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:09:29,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:29,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:29,617 INFO L225 Difference]: With dead ends: 6298 [2021-05-03 14:09:29,617 INFO L226 Difference]: Without dead ends: 6298 [2021-05-03 14:09:29,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:29,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6298 states. [2021-05-03 14:09:29,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6298 to 5549. [2021-05-03 14:09:29,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 2.994592645998558) internal successors, (16614), 5548 states have internal predecessors, (16614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 16614 transitions. [2021-05-03 14:09:29,705 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 16614 transitions. Word has length 21 [2021-05-03 14:09:29,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:29,705 INFO L480 AbstractCegarLoop]: Abstraction has 5549 states and 16614 transitions. [2021-05-03 14:09:29,705 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) [2021-05-03 14:09:29,705 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 16614 transitions. [2021-05-03 14:09:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:29,709 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:29,709 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:29,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16233 [2021-05-03 14:09:29,910 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:29,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:29,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1771892424, now seen corresponding path program 305 times [2021-05-03 14:09:29,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:29,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804414949] [2021-05-03 14:09:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:29,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804414949] [2021-05-03 14:09:29,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645275007] [2021-05-03 14:09:29,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:29,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:09:29,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:29,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:29,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:09:30,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:30,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:09:30,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292173938] [2021-05-03 14:09:30,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:09:30,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:30,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:09:30,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:30,054 INFO L87 Difference]: Start difference. First operand 5549 states and 16614 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:30,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:30,181 INFO L93 Difference]: Finished difference Result 5861 states and 17231 transitions. [2021-05-03 14:09:30,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:09:30,182 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:30,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:30,189 INFO L225 Difference]: With dead ends: 5861 [2021-05-03 14:09:30,189 INFO L226 Difference]: Without dead ends: 5859 [2021-05-03 14:09:30,189 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:30,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5859 states. [2021-05-03 14:09:30,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5859 to 5592. [2021-05-03 14:09:30,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5592 states, 5591 states have (on average 2.996959399034162) internal successors, (16756), 5591 states have internal predecessors, (16756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5592 states to 5592 states and 16756 transitions. [2021-05-03 14:09:30,263 INFO L78 Accepts]: Start accepts. Automaton has 5592 states and 16756 transitions. Word has length 21 [2021-05-03 14:09:30,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:30,263 INFO L480 AbstractCegarLoop]: Abstraction has 5592 states and 16756 transitions. [2021-05-03 14:09:30,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 5592 states and 16756 transitions. [2021-05-03 14:09:30,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:30,268 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:30,268 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:30,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16234 [2021-05-03 14:09:30,468 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:30,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:30,468 INFO L82 PathProgramCache]: Analyzing trace with hash 994742825, now seen corresponding path program 306 times [2021-05-03 14:09:30,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:30,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728386557] [2021-05-03 14:09:30,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:30,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728386557] [2021-05-03 14:09:30,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109158271] [2021-05-03 14:09:30,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:30,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:09:30,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:30,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:30,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:09:30,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:30,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:09:30,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590116141] [2021-05-03 14:09:30,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:09:30,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:30,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:09:30,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:30,591 INFO L87 Difference]: Start difference. First operand 5592 states and 16756 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:30,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:30,761 INFO L93 Difference]: Finished difference Result 5825 states and 17153 transitions. [2021-05-03 14:09:30,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:09:30,762 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:30,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:30,769 INFO L225 Difference]: With dead ends: 5825 [2021-05-03 14:09:30,769 INFO L226 Difference]: Without dead ends: 5823 [2021-05-03 14:09:30,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:09:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5823 states. [2021-05-03 14:09:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5823 to 5602. [2021-05-03 14:09:30,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5602 states, 5601 states have (on average 2.997143367255847) internal successors, (16787), 5601 states have internal predecessors, (16787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:30,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5602 states to 5602 states and 16787 transitions. [2021-05-03 14:09:30,842 INFO L78 Accepts]: Start accepts. Automaton has 5602 states and 16787 transitions. Word has length 21 [2021-05-03 14:09:30,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:30,843 INFO L480 AbstractCegarLoop]: Abstraction has 5602 states and 16787 transitions. [2021-05-03 14:09:30,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 5602 states and 16787 transitions. [2021-05-03 14:09:30,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:30,847 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:30,847 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:31,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16235,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:31,047 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:31,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:31,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1535817962, now seen corresponding path program 307 times [2021-05-03 14:09:31,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:31,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716537516] [2021-05-03 14:09:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:31,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716537516] [2021-05-03 14:09:31,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004698222] [2021-05-03 14:09:31,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:31,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:31,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:31,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:31,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:09:31,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216559440] [2021-05-03 14:09:31,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:09:31,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:31,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:09:31,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:31,168 INFO L87 Difference]: Start difference. First operand 5602 states and 16787 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:31,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:31,348 INFO L93 Difference]: Finished difference Result 5786 states and 17096 transitions. [2021-05-03 14:09:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:09:31,349 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:31,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:31,355 INFO L225 Difference]: With dead ends: 5786 [2021-05-03 14:09:31,355 INFO L226 Difference]: Without dead ends: 5778 [2021-05-03 14:09:31,355 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:31,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5778 states. [2021-05-03 14:09:31,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5778 to 5570. [2021-05-03 14:09:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5569 states have (on average 2.995151732806608) internal successors, (16680), 5569 states have internal predecessors, (16680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 16680 transitions. [2021-05-03 14:09:31,428 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 16680 transitions. Word has length 21 [2021-05-03 14:09:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:31,429 INFO L480 AbstractCegarLoop]: Abstraction has 5570 states and 16680 transitions. [2021-05-03 14:09:31,429 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) [2021-05-03 14:09:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 16680 transitions. [2021-05-03 14:09:31,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:31,433 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:31,433 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:31,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16236 [2021-05-03 14:09:31,633 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:31,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash 644496331, now seen corresponding path program 308 times [2021-05-03 14:09:31,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:31,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003851990] [2021-05-03 14:09:31,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:31,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003851990] [2021-05-03 14:09:31,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996356089] [2021-05-03 14:09:31,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:31,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:31,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:31,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:31,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:31,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:31,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:09:31,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482925064] [2021-05-03 14:09:31,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:09:31,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:31,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:09:31,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:31,766 INFO L87 Difference]: Start difference. First operand 5570 states and 16680 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:31,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:31,878 INFO L93 Difference]: Finished difference Result 6267 states and 18410 transitions. [2021-05-03 14:09:31,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:09:31,879 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:31,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:31,886 INFO L225 Difference]: With dead ends: 6267 [2021-05-03 14:09:31,886 INFO L226 Difference]: Without dead ends: 6267 [2021-05-03 14:09:31,886 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:31,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6267 states. [2021-05-03 14:09:31,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6267 to 5560. [2021-05-03 14:09:31,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 2.99388379204893) internal successors, (16643), 5559 states have internal predecessors, (16643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 16643 transitions. [2021-05-03 14:09:31,957 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 16643 transitions. Word has length 21 [2021-05-03 14:09:31,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:31,957 INFO L480 AbstractCegarLoop]: Abstraction has 5560 states and 16643 transitions. [2021-05-03 14:09:31,957 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) [2021-05-03 14:09:31,957 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 16643 transitions. [2021-05-03 14:09:31,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:31,961 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:31,961 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:32,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16237,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:32,162 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:32,162 INFO L82 PathProgramCache]: Analyzing trace with hash 462732582, now seen corresponding path program 309 times [2021-05-03 14:09:32,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:32,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156973458] [2021-05-03 14:09:32,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:32,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156973458] [2021-05-03 14:09:32,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124926184] [2021-05-03 14:09:32,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:32,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:09:32,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:32,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:32,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:32,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:32,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:09:32,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972483106] [2021-05-03 14:09:32,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:32,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:32,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:32,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:32,304 INFO L87 Difference]: Start difference. First operand 5560 states and 16643 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:32,476 INFO L93 Difference]: Finished difference Result 5734 states and 16945 transitions. [2021-05-03 14:09:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:09:32,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:32,484 INFO L225 Difference]: With dead ends: 5734 [2021-05-03 14:09:32,484 INFO L226 Difference]: Without dead ends: 5728 [2021-05-03 14:09:32,484 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:09:32,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5728 states. [2021-05-03 14:09:32,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5728 to 5560. [2021-05-03 14:09:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 2.993344126641482) internal successors, (16640), 5559 states have internal predecessors, (16640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 16640 transitions. [2021-05-03 14:09:32,558 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 16640 transitions. Word has length 21 [2021-05-03 14:09:32,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:32,558 INFO L480 AbstractCegarLoop]: Abstraction has 5560 states and 16640 transitions. [2021-05-03 14:09:32,558 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) [2021-05-03 14:09:32,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 16640 transitions. [2021-05-03 14:09:32,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:32,562 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:32,562 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:32,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16238,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:32,763 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:32,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:32,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1182351909, now seen corresponding path program 310 times [2021-05-03 14:09:32,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:32,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659541932] [2021-05-03 14:09:32,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:32,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659541932] [2021-05-03 14:09:32,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757084949] [2021-05-03 14:09:32,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:32,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:32,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:32,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:32,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:32,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:32,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:09:32,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931872323] [2021-05-03 14:09:32,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:32,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:32,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:32,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:32,905 INFO L87 Difference]: Start difference. First operand 5560 states and 16640 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:33,069 INFO L93 Difference]: Finished difference Result 6745 states and 19766 transitions. [2021-05-03 14:09:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:09:33,070 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:33,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:33,100 INFO L225 Difference]: With dead ends: 6745 [2021-05-03 14:09:33,100 INFO L226 Difference]: Without dead ends: 6745 [2021-05-03 14:09:33,100 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6745 states. [2021-05-03 14:09:33,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6745 to 5531. [2021-05-03 14:09:33,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5531 states, 5530 states have (on average 2.992405063291139) internal successors, (16548), 5530 states have internal predecessors, (16548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:33,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5531 states to 5531 states and 16548 transitions. [2021-05-03 14:09:33,171 INFO L78 Accepts]: Start accepts. Automaton has 5531 states and 16548 transitions. Word has length 21 [2021-05-03 14:09:33,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:33,171 INFO L480 AbstractCegarLoop]: Abstraction has 5531 states and 16548 transitions. [2021-05-03 14:09:33,171 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) [2021-05-03 14:09:33,172 INFO L276 IsEmpty]: Start isEmpty. Operand 5531 states and 16548 transitions. [2021-05-03 14:09:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:33,176 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:33,176 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:33,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16239,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:33,376 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:33,377 INFO L82 PathProgramCache]: Analyzing trace with hash 276117618, now seen corresponding path program 311 times [2021-05-03 14:09:33,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:33,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637114814] [2021-05-03 14:09:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:33,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637114814] [2021-05-03 14:09:33,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113174847] [2021-05-03 14:09:33,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:33,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:09:33,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:33,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:33,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:09:33,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:33,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:09:33,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971064291] [2021-05-03 14:09:33,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:09:33,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:33,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:09:33,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:33,506 INFO L87 Difference]: Start difference. First operand 5531 states and 16548 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:33,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:33,610 INFO L93 Difference]: Finished difference Result 5788 states and 17031 transitions. [2021-05-03 14:09:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:09:33,611 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:33,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:33,618 INFO L225 Difference]: With dead ends: 5788 [2021-05-03 14:09:33,619 INFO L226 Difference]: Without dead ends: 5786 [2021-05-03 14:09:33,619 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:33,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-05-03 14:09:33,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 5550. [2021-05-03 14:09:33,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 2.9938727698684446) internal successors, (16613), 5549 states have internal predecessors, (16613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:33,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 16613 transitions. [2021-05-03 14:09:33,692 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 16613 transitions. Word has length 21 [2021-05-03 14:09:33,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:33,692 INFO L480 AbstractCegarLoop]: Abstraction has 5550 states and 16613 transitions. [2021-05-03 14:09:33,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 16613 transitions. [2021-05-03 14:09:33,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:33,696 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:33,696 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:33,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16240,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:33,897 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:33,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:33,897 INFO L82 PathProgramCache]: Analyzing trace with hash -501031981, now seen corresponding path program 312 times [2021-05-03 14:09:33,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:33,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271880440] [2021-05-03 14:09:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:33,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271880440] [2021-05-03 14:09:33,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841064093] [2021-05-03 14:09:33,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:33,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:09:33,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:33,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:33,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:09:34,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:34,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:09:34,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801278877] [2021-05-03 14:09:34,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:09:34,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:34,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:09:34,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:34,027 INFO L87 Difference]: Start difference. First operand 5550 states and 16613 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:34,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:34,195 INFO L93 Difference]: Finished difference Result 5761 states and 16965 transitions. [2021-05-03 14:09:34,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:09:34,196 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:34,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:34,203 INFO L225 Difference]: With dead ends: 5761 [2021-05-03 14:09:34,203 INFO L226 Difference]: Without dead ends: 5759 [2021-05-03 14:09:34,203 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:09:34,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5759 states. [2021-05-03 14:09:34,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5759 to 5562. [2021-05-03 14:09:34,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5562 states, 5561 states have (on average 2.994425463046215) internal successors, (16652), 5561 states have internal predecessors, (16652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 16652 transitions. [2021-05-03 14:09:34,282 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 16652 transitions. Word has length 21 [2021-05-03 14:09:34,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:34,282 INFO L480 AbstractCegarLoop]: Abstraction has 5562 states and 16652 transitions. [2021-05-03 14:09:34,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:34,282 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 16652 transitions. [2021-05-03 14:09:34,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:34,287 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:34,287 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:34,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16241 [2021-05-03 14:09:34,487 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:34,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:34,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1033042224, now seen corresponding path program 313 times [2021-05-03 14:09:34,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:34,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830284454] [2021-05-03 14:09:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:34,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830284454] [2021-05-03 14:09:34,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550886914] [2021-05-03 14:09:34,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:34,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:34,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:34,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:34,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:09:34,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411548819] [2021-05-03 14:09:34,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:34,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:34,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:34,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:34,630 INFO L87 Difference]: Start difference. First operand 5562 states and 16652 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:34,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:34,859 INFO L93 Difference]: Finished difference Result 5736 states and 16954 transitions. [2021-05-03 14:09:34,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:09:34,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:34,867 INFO L225 Difference]: With dead ends: 5736 [2021-05-03 14:09:34,867 INFO L226 Difference]: Without dead ends: 5730 [2021-05-03 14:09:34,867 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:09:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5730 states. [2021-05-03 14:09:34,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5730 to 5534. [2021-05-03 14:09:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5534 states, 5533 states have (on average 2.9942165190674137) internal successors, (16567), 5533 states have internal predecessors, (16567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:34,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5534 states to 5534 states and 16567 transitions. [2021-05-03 14:09:34,948 INFO L78 Accepts]: Start accepts. Automaton has 5534 states and 16567 transitions. Word has length 21 [2021-05-03 14:09:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:34,948 INFO L480 AbstractCegarLoop]: Abstraction has 5534 states and 16567 transitions. [2021-05-03 14:09:34,948 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) [2021-05-03 14:09:34,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5534 states and 16567 transitions. [2021-05-03 14:09:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:34,953 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:34,953 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:35,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16242 [2021-05-03 14:09:35,154 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:35,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:35,154 INFO L82 PathProgramCache]: Analyzing trace with hash -313422897, now seen corresponding path program 314 times [2021-05-03 14:09:35,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:35,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610408080] [2021-05-03 14:09:35,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:35,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610408080] [2021-05-03 14:09:35,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933935648] [2021-05-03 14:09:35,227 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 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 [2021-05-03 14:09:35,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:35,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:35,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:35,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:35,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:35,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:09:35,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326110928] [2021-05-03 14:09:35,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:35,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:35,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:35,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:35,304 INFO L87 Difference]: Start difference. First operand 5534 states and 16567 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:35,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:35,439 INFO L93 Difference]: Finished difference Result 6490 states and 19040 transitions. [2021-05-03 14:09:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:09:35,440 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:35,448 INFO L225 Difference]: With dead ends: 6490 [2021-05-03 14:09:35,449 INFO L226 Difference]: Without dead ends: 6490 [2021-05-03 14:09:35,449 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:09:35,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6490 states. [2021-05-03 14:09:35,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6490 to 5526. [2021-05-03 14:09:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5526 states, 5525 states have (on average 2.9931221719457013) internal successors, (16537), 5525 states have internal predecessors, (16537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:35,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5526 states to 5526 states and 16537 transitions. [2021-05-03 14:09:35,540 INFO L78 Accepts]: Start accepts. Automaton has 5526 states and 16537 transitions. Word has length 21 [2021-05-03 14:09:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:35,540 INFO L480 AbstractCegarLoop]: Abstraction has 5526 states and 16537 transitions. [2021-05-03 14:09:35,540 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) [2021-05-03 14:09:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 5526 states and 16537 transitions. [2021-05-03 14:09:35,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:35,545 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:35,545 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:35,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16243 [2021-05-03 14:09:35,746 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:35,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:35,746 INFO L82 PathProgramCache]: Analyzing trace with hash 61049364, now seen corresponding path program 315 times [2021-05-03 14:09:35,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:35,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733903992] [2021-05-03 14:09:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:35,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733903992] [2021-05-03 14:09:35,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118064714] [2021-05-03 14:09:35,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:35,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:09:35,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:35,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:35,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:35,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:35,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:09:35,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198404260] [2021-05-03 14:09:35,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:35,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:35,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:35,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:35,896 INFO L87 Difference]: Start difference. First operand 5526 states and 16537 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:36,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:36,077 INFO L93 Difference]: Finished difference Result 5752 states and 17010 transitions. [2021-05-03 14:09:36,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:09:36,078 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:36,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:36,086 INFO L225 Difference]: With dead ends: 5752 [2021-05-03 14:09:36,086 INFO L226 Difference]: Without dead ends: 5744 [2021-05-03 14:09:36,086 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:36,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5744 states. [2021-05-03 14:09:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5744 to 5527. [2021-05-03 14:09:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5527 states, 5526 states have (on average 2.9927614911328266) internal successors, (16538), 5526 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:36,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5527 states to 5527 states and 16538 transitions. [2021-05-03 14:09:36,168 INFO L78 Accepts]: Start accepts. Automaton has 5527 states and 16538 transitions. Word has length 21 [2021-05-03 14:09:36,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:36,168 INFO L480 AbstractCegarLoop]: Abstraction has 5527 states and 16538 transitions. [2021-05-03 14:09:36,168 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) [2021-05-03 14:09:36,168 INFO L276 IsEmpty]: Start isEmpty. Operand 5527 states and 16538 transitions. [2021-05-03 14:09:36,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:36,173 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:36,173 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:36,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16244 [2021-05-03 14:09:36,373 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:36,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:36,374 INFO L82 PathProgramCache]: Analyzing trace with hash -819769163, now seen corresponding path program 316 times [2021-05-03 14:09:36,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:36,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474587593] [2021-05-03 14:09:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:36,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474587593] [2021-05-03 14:09:36,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841835779] [2021-05-03 14:09:36,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:36,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:36,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:36,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:36,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:36,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:36,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:09:36,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956650288] [2021-05-03 14:09:36,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:36,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:36,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:36,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:36,540 INFO L87 Difference]: Start difference. First operand 5527 states and 16538 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:36,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:36,770 INFO L93 Difference]: Finished difference Result 7065 states and 20726 transitions. [2021-05-03 14:09:36,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:09:36,771 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:36,781 INFO L225 Difference]: With dead ends: 7065 [2021-05-03 14:09:36,781 INFO L226 Difference]: Without dead ends: 7065 [2021-05-03 14:09:36,782 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:09:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7065 states. [2021-05-03 14:09:36,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7065 to 5559. [2021-05-03 14:09:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5559 states, 5558 states have (on average 2.9899244332493704) internal successors, (16618), 5558 states have internal predecessors, (16618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:36,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5559 states to 5559 states and 16618 transitions. [2021-05-03 14:09:36,872 INFO L78 Accepts]: Start accepts. Automaton has 5559 states and 16618 transitions. Word has length 21 [2021-05-03 14:09:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:36,872 INFO L480 AbstractCegarLoop]: Abstraction has 5559 states and 16618 transitions. [2021-05-03 14:09:36,872 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) [2021-05-03 14:09:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 5559 states and 16618 transitions. [2021-05-03 14:09:36,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:36,877 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:36,877 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:37,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16245,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:37,077 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:37,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:37,078 INFO L82 PathProgramCache]: Analyzing trace with hash -2090839484, now seen corresponding path program 317 times [2021-05-03 14:09:37,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:37,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321157575] [2021-05-03 14:09:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:37,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321157575] [2021-05-03 14:09:37,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270537141] [2021-05-03 14:09:37,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:37,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:09:37,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:37,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:37,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:37,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:37,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:09:37,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324221564] [2021-05-03 14:09:37,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:37,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:37,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:37,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:37,221 INFO L87 Difference]: Start difference. First operand 5559 states and 16618 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:37,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:37,419 INFO L93 Difference]: Finished difference Result 5721 states and 16907 transitions. [2021-05-03 14:09:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:09:37,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:37,426 INFO L225 Difference]: With dead ends: 5721 [2021-05-03 14:09:37,426 INFO L226 Difference]: Without dead ends: 5713 [2021-05-03 14:09:37,426 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:09:37,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2021-05-03 14:09:37,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 5559. [2021-05-03 14:09:37,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5559 states, 5558 states have (on average 2.989564591579705) internal successors, (16616), 5558 states have internal predecessors, (16616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:37,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5559 states to 5559 states and 16616 transitions. [2021-05-03 14:09:37,495 INFO L78 Accepts]: Start accepts. Automaton has 5559 states and 16616 transitions. Word has length 21 [2021-05-03 14:09:37,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:37,495 INFO L480 AbstractCegarLoop]: Abstraction has 5559 states and 16616 transitions. [2021-05-03 14:09:37,495 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) [2021-05-03 14:09:37,495 INFO L276 IsEmpty]: Start isEmpty. Operand 5559 states and 16616 transitions. [2021-05-03 14:09:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:37,499 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:37,499 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:37,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16246 [2021-05-03 14:09:37,700 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:37,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1323309285, now seen corresponding path program 318 times [2021-05-03 14:09:37,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:37,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347327108] [2021-05-03 14:09:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:37,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347327108] [2021-05-03 14:09:37,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699893592] [2021-05-03 14:09:37,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:37,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:09:37,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:37,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:37,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:37,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:37,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:09:37,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546859821] [2021-05-03 14:09:37,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:37,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:37,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:37,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:37,852 INFO L87 Difference]: Start difference. First operand 5559 states and 16616 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:38,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:38,044 INFO L93 Difference]: Finished difference Result 7043 states and 20681 transitions. [2021-05-03 14:09:38,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:09:38,045 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:38,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:38,055 INFO L225 Difference]: With dead ends: 7043 [2021-05-03 14:09:38,055 INFO L226 Difference]: Without dead ends: 7043 [2021-05-03 14:09:38,055 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:09:38,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7043 states. [2021-05-03 14:09:38,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7043 to 3914. [2021-05-03 14:09:38,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3913 states have (on average 2.9608995655507284) internal successors, (11586), 3913 states have internal predecessors, (11586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 11586 transitions. [2021-05-03 14:09:38,127 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 11586 transitions. Word has length 21 [2021-05-03 14:09:38,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:38,127 INFO L480 AbstractCegarLoop]: Abstraction has 3914 states and 11586 transitions. [2021-05-03 14:09:38,127 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) [2021-05-03 14:09:38,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 11586 transitions. [2021-05-03 14:09:38,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:38,131 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:38,131 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:38,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16247 [2021-05-03 14:09:38,331 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:38,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1151738888, now seen corresponding path program 319 times [2021-05-03 14:09:38,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:38,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581061386] [2021-05-03 14:09:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:38,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581061386] [2021-05-03 14:09:38,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896112459] [2021-05-03 14:09:38,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:38,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:38,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:09:38,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:38,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:09:38,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475560257] [2021-05-03 14:09:38,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:09:38,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:38,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:09:38,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:38,459 INFO L87 Difference]: Start difference. First operand 3914 states and 11586 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:38,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:38,548 INFO L93 Difference]: Finished difference Result 4174 states and 12068 transitions. [2021-05-03 14:09:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:09:38,548 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:38,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:38,552 INFO L225 Difference]: With dead ends: 4174 [2021-05-03 14:09:38,552 INFO L226 Difference]: Without dead ends: 4172 [2021-05-03 14:09:38,552 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:38,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2021-05-03 14:09:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3916. [2021-05-03 14:09:38,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 2.9591315453384417) internal successors, (11585), 3915 states have internal predecessors, (11585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:38,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 11585 transitions. [2021-05-03 14:09:38,600 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 11585 transitions. Word has length 21 [2021-05-03 14:09:38,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:38,600 INFO L480 AbstractCegarLoop]: Abstraction has 3916 states and 11585 transitions. [2021-05-03 14:09:38,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:38,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 11585 transitions. [2021-05-03 14:09:38,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:38,603 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:38,603 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:38,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16248,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:38,804 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:38,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:38,804 INFO L82 PathProgramCache]: Analyzing trace with hash 374589289, now seen corresponding path program 320 times [2021-05-03 14:09:38,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:38,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572775004] [2021-05-03 14:09:38,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:38,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572775004] [2021-05-03 14:09:38,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324327593] [2021-05-03 14:09:38,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:38,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:38,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:38,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:38,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:09:38,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:38,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:09:38,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613673641] [2021-05-03 14:09:38,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:09:38,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:38,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:09:38,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:38,918 INFO L87 Difference]: Start difference. First operand 3916 states and 11585 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:39,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:39,085 INFO L93 Difference]: Finished difference Result 4111 states and 11901 transitions. [2021-05-03 14:09:39,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:09:39,086 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:39,091 INFO L225 Difference]: With dead ends: 4111 [2021-05-03 14:09:39,091 INFO L226 Difference]: Without dead ends: 4107 [2021-05-03 14:09:39,091 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:09:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2021-05-03 14:09:39,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3926. [2021-05-03 14:09:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 2.959235668789809) internal successors, (11615), 3925 states have internal predecessors, (11615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 11615 transitions. [2021-05-03 14:09:39,139 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 11615 transitions. Word has length 21 [2021-05-03 14:09:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:39,139 INFO L480 AbstractCegarLoop]: Abstraction has 3926 states and 11615 transitions. [2021-05-03 14:09:39,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 11615 transitions. [2021-05-03 14:09:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:39,143 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:39,143 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:39,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16249,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:39,343 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:39,343 INFO L82 PathProgramCache]: Analyzing trace with hash 915664426, now seen corresponding path program 321 times [2021-05-03 14:09:39,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:39,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216458418] [2021-05-03 14:09:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:39,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216458418] [2021-05-03 14:09:39,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107002152] [2021-05-03 14:09:39,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:39,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:09:39,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:39,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:39,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:39,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:39,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:09:39,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791908285] [2021-05-03 14:09:39,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:09:39,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:39,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:09:39,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:39,461 INFO L87 Difference]: Start difference. First operand 3926 states and 11615 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:39,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:39,634 INFO L93 Difference]: Finished difference Result 4151 states and 11987 transitions. [2021-05-03 14:09:39,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:09:39,635 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:39,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:39,639 INFO L225 Difference]: With dead ends: 4151 [2021-05-03 14:09:39,639 INFO L226 Difference]: Without dead ends: 4139 [2021-05-03 14:09:39,640 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:39,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-05-03 14:09:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3894. [2021-05-03 14:09:39,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3894 states, 3893 states have (on average 2.959671204726432) internal successors, (11522), 3893 states have internal predecessors, (11522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3894 states to 3894 states and 11522 transitions. [2021-05-03 14:09:39,689 INFO L78 Accepts]: Start accepts. Automaton has 3894 states and 11522 transitions. Word has length 21 [2021-05-03 14:09:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:39,689 INFO L480 AbstractCegarLoop]: Abstraction has 3894 states and 11522 transitions. [2021-05-03 14:09:39,689 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) [2021-05-03 14:09:39,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3894 states and 11522 transitions. [2021-05-03 14:09:39,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:39,692 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:39,692 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:39,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16250 [2021-05-03 14:09:39,893 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:39,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:39,893 INFO L82 PathProgramCache]: Analyzing trace with hash 24342795, now seen corresponding path program 322 times [2021-05-03 14:09:39,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:39,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367710102] [2021-05-03 14:09:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:39,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367710102] [2021-05-03 14:09:39,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543894713] [2021-05-03 14:09:39,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:39,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:39,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:39,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:39,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:40,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:40,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:09:40,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462558468] [2021-05-03 14:09:40,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:09:40,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:40,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:09:40,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:40,016 INFO L87 Difference]: Start difference. First operand 3894 states and 11522 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:40,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:40,125 INFO L93 Difference]: Finished difference Result 4318 states and 12449 transitions. [2021-05-03 14:09:40,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:09:40,126 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:40,130 INFO L225 Difference]: With dead ends: 4318 [2021-05-03 14:09:40,130 INFO L226 Difference]: Without dead ends: 4318 [2021-05-03 14:09:40,130 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2021-05-03 14:09:40,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 3872. [2021-05-03 14:09:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3872 states, 3871 states have (on average 2.9571170240247997) internal successors, (11447), 3871 states have internal predecessors, (11447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:40,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3872 states to 3872 states and 11447 transitions. [2021-05-03 14:09:40,176 INFO L78 Accepts]: Start accepts. Automaton has 3872 states and 11447 transitions. Word has length 21 [2021-05-03 14:09:40,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:40,176 INFO L480 AbstractCegarLoop]: Abstraction has 3872 states and 11447 transitions. [2021-05-03 14:09:40,176 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) [2021-05-03 14:09:40,176 INFO L276 IsEmpty]: Start isEmpty. Operand 3872 states and 11447 transitions. [2021-05-03 14:09:40,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:40,179 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:40,179 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:40,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16251 [2021-05-03 14:09:40,380 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:40,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:40,380 INFO L82 PathProgramCache]: Analyzing trace with hash 936670634, now seen corresponding path program 323 times [2021-05-03 14:09:40,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:40,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848394439] [2021-05-03 14:09:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:40,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848394439] [2021-05-03 14:09:40,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561563929] [2021-05-03 14:09:40,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:40,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:09:40,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:40,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:40,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:40,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:40,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:09:40,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575756733] [2021-05-03 14:09:40,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:40,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:40,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:40,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:40,558 INFO L87 Difference]: Start difference. First operand 3872 states and 11447 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:40,778 INFO L93 Difference]: Finished difference Result 4056 states and 11770 transitions. [2021-05-03 14:09:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:09:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:40,784 INFO L225 Difference]: With dead ends: 4056 [2021-05-03 14:09:40,784 INFO L226 Difference]: Without dead ends: 4048 [2021-05-03 14:09:40,784 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4048 states. [2021-05-03 14:09:40,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4048 to 3878. [2021-05-03 14:09:40,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.9551199380964666) internal successors, (11457), 3877 states have internal predecessors, (11457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:40,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 11457 transitions. [2021-05-03 14:09:40,831 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 11457 transitions. Word has length 21 [2021-05-03 14:09:40,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:40,831 INFO L480 AbstractCegarLoop]: Abstraction has 3878 states and 11457 transitions. [2021-05-03 14:09:40,831 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) [2021-05-03 14:09:40,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 11457 transitions. [2021-05-03 14:09:40,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:40,834 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:40,834 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:41,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16252,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:41,035 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:41,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:41,035 INFO L82 PathProgramCache]: Analyzing trace with hash 55852107, now seen corresponding path program 324 times [2021-05-03 14:09:41,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:41,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516773811] [2021-05-03 14:09:41,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:41,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516773811] [2021-05-03 14:09:41,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647921104] [2021-05-03 14:09:41,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:41,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:09:41,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:41,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:41,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:41,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:41,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:09:41,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818315900] [2021-05-03 14:09:41,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:41,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:41,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:41,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:41,191 INFO L87 Difference]: Start difference. First operand 3878 states and 11457 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:41,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:41,353 INFO L93 Difference]: Finished difference Result 4744 states and 13653 transitions. [2021-05-03 14:09:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:09:41,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:41,359 INFO L225 Difference]: With dead ends: 4744 [2021-05-03 14:09:41,359 INFO L226 Difference]: Without dead ends: 4744 [2021-05-03 14:09:41,359 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:09:41,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2021-05-03 14:09:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 2823. [2021-05-03 14:09:41,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2822 states have (on average 2.919206236711552) internal successors, (8238), 2822 states have internal predecessors, (8238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:41,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 8238 transitions. [2021-05-03 14:09:41,401 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 8238 transitions. Word has length 21 [2021-05-03 14:09:41,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:41,401 INFO L480 AbstractCegarLoop]: Abstraction has 2823 states and 8238 transitions. [2021-05-03 14:09:41,401 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) [2021-05-03 14:09:41,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 8238 transitions. [2021-05-03 14:09:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:41,403 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:41,403 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:41,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16253 [2021-05-03 14:09:41,603 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:41,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:41,604 INFO L82 PathProgramCache]: Analyzing trace with hash 493771494, now seen corresponding path program 325 times [2021-05-03 14:09:41,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:41,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166867656] [2021-05-03 14:09:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:41,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166867656] [2021-05-03 14:09:41,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455935598] [2021-05-03 14:09:41,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:41,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:41,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:41,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:41,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:09:41,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557476027] [2021-05-03 14:09:41,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:41,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:41,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:41,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:41,751 INFO L87 Difference]: Start difference. First operand 2823 states and 8238 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:41,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:41,914 INFO L93 Difference]: Finished difference Result 3224 states and 9127 transitions. [2021-05-03 14:09:41,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:09:41,914 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:41,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:41,917 INFO L225 Difference]: With dead ends: 3224 [2021-05-03 14:09:41,917 INFO L226 Difference]: Without dead ends: 3214 [2021-05-03 14:09:41,918 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:09:41,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-05-03 14:09:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 2839. [2021-05-03 14:09:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2839 states, 2838 states have (on average 2.9147286821705425) internal successors, (8272), 2838 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 8272 transitions. [2021-05-03 14:09:41,948 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 8272 transitions. Word has length 21 [2021-05-03 14:09:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:41,948 INFO L480 AbstractCegarLoop]: Abstraction has 2839 states and 8272 transitions. [2021-05-03 14:09:41,949 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) [2021-05-03 14:09:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 8272 transitions. [2021-05-03 14:09:41,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:41,951 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:41,951 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:42,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16254 [2021-05-03 14:09:42,151 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:42,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:42,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1538987045, now seen corresponding path program 326 times [2021-05-03 14:09:42,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:42,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083350534] [2021-05-03 14:09:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:42,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083350534] [2021-05-03 14:09:42,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143064622] [2021-05-03 14:09:42,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:42,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:42,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:42,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:42,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:42,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:42,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:09:42,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909062931] [2021-05-03 14:09:42,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:42,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:42,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:42,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:42,307 INFO L87 Difference]: Start difference. First operand 2839 states and 8272 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:42,570 INFO L93 Difference]: Finished difference Result 5034 states and 14432 transitions. [2021-05-03 14:09:42,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:09:42,571 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:42,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:42,577 INFO L225 Difference]: With dead ends: 5034 [2021-05-03 14:09:42,577 INFO L226 Difference]: Without dead ends: 5034 [2021-05-03 14:09:42,577 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:09:42,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5034 states. [2021-05-03 14:09:42,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5034 to 3008. [2021-05-03 14:09:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.9514466245427338) internal successors, (8875), 3007 states have internal predecessors, (8875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8875 transitions. [2021-05-03 14:09:42,621 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8875 transitions. Word has length 21 [2021-05-03 14:09:42,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:42,621 INFO L480 AbstractCegarLoop]: Abstraction has 3008 states and 8875 transitions. [2021-05-03 14:09:42,621 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) [2021-05-03 14:09:42,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8875 transitions. [2021-05-03 14:09:42,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:42,623 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:42,623 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:42,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16255 [2021-05-03 14:09:42,824 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:42,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:42,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1790273354, now seen corresponding path program 327 times [2021-05-03 14:09:42,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:42,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667361165] [2021-05-03 14:09:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:42,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667361165] [2021-05-03 14:09:42,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864973553] [2021-05-03 14:09:42,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:42,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:09:42,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:42,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:42,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:42,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:42,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:09:42,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218282775] [2021-05-03 14:09:42,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:42,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:42,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:42,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:42,989 INFO L87 Difference]: Start difference. First operand 3008 states and 8875 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:43,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:43,186 INFO L93 Difference]: Finished difference Result 3214 states and 9274 transitions. [2021-05-03 14:09:43,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:09:43,186 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:43,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:43,190 INFO L225 Difference]: With dead ends: 3214 [2021-05-03 14:09:43,190 INFO L226 Difference]: Without dead ends: 3204 [2021-05-03 14:09:43,190 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:09:43,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2021-05-03 14:09:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 3008. [2021-05-03 14:09:43,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.950116395078151) internal successors, (8871), 3007 states have internal predecessors, (8871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8871 transitions. [2021-05-03 14:09:43,222 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8871 transitions. Word has length 21 [2021-05-03 14:09:43,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:43,222 INFO L480 AbstractCegarLoop]: Abstraction has 3008 states and 8871 transitions. [2021-05-03 14:09:43,222 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) [2021-05-03 14:09:43,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8871 transitions. [2021-05-03 14:09:43,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:43,224 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:43,224 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:43,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16256 [2021-05-03 14:09:43,424 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:43,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:43,425 INFO L82 PathProgramCache]: Analyzing trace with hash -745057803, now seen corresponding path program 328 times [2021-05-03 14:09:43,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:43,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437342679] [2021-05-03 14:09:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:43,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437342679] [2021-05-03 14:09:43,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586825100] [2021-05-03 14:09:43,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:09:43,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:43,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:43,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:43,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:43,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:43,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:09:43,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735783144] [2021-05-03 14:09:43,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:43,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:43,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:43,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:43,558 INFO L87 Difference]: Start difference. First operand 3008 states and 8871 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:43,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:43,783 INFO L93 Difference]: Finished difference Result 3988 states and 11457 transitions. [2021-05-03 14:09:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:09:43,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:43,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:43,788 INFO L225 Difference]: With dead ends: 3988 [2021-05-03 14:09:43,788 INFO L226 Difference]: Without dead ends: 3986 [2021-05-03 14:09:43,788 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:09:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-05-03 14:09:43,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 1933. [2021-05-03 14:09:43,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.9073498964803313) internal successors, (5617), 1932 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 5617 transitions. [2021-05-03 14:09:43,819 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 5617 transitions. Word has length 21 [2021-05-03 14:09:43,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:43,819 INFO L480 AbstractCegarLoop]: Abstraction has 1933 states and 5617 transitions. [2021-05-03 14:09:43,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 5617 transitions. [2021-05-03 14:09:43,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:43,821 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:43,821 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:44,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16257 [2021-05-03 14:09:44,022 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:44,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:44,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1768772814, now seen corresponding path program 329 times [2021-05-03 14:09:44,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:44,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665040087] [2021-05-03 14:09:44,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:44,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665040087] [2021-05-03 14:09:44,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653656495] [2021-05-03 14:09:44,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:44,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:09:44,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:44,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:44,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:09:44,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:44,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:09:44,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10452520] [2021-05-03 14:09:44,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:09:44,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:44,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:09:44,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:44,153 INFO L87 Difference]: Start difference. First operand 1933 states and 5617 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:44,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:44,225 INFO L93 Difference]: Finished difference Result 2184 states and 6076 transitions. [2021-05-03 14:09:44,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:09:44,226 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:44,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:44,228 INFO L225 Difference]: With dead ends: 2184 [2021-05-03 14:09:44,228 INFO L226 Difference]: Without dead ends: 2182 [2021-05-03 14:09:44,228 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:44,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-05-03 14:09:44,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1921. [2021-05-03 14:09:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 2.9036458333333335) internal successors, (5575), 1920 states have internal predecessors, (5575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 5575 transitions. [2021-05-03 14:09:44,248 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 5575 transitions. Word has length 21 [2021-05-03 14:09:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:44,248 INFO L480 AbstractCegarLoop]: Abstraction has 1921 states and 5575 transitions. [2021-05-03 14:09:44,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:44,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 5575 transitions. [2021-05-03 14:09:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:44,250 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:44,250 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:44,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16258 [2021-05-03 14:09:44,450 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:44,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:44,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1749044883, now seen corresponding path program 330 times [2021-05-03 14:09:44,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:44,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365595790] [2021-05-03 14:09:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:44,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365595790] [2021-05-03 14:09:44,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87729386] [2021-05-03 14:09:44,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:44,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:09:44,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:44,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:44,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:09:44,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:44,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:09:44,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436105504] [2021-05-03 14:09:44,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:09:44,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:44,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:09:44,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:44,572 INFO L87 Difference]: Start difference. First operand 1921 states and 5575 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:44,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:44,724 INFO L93 Difference]: Finished difference Result 2090 states and 5850 transitions. [2021-05-03 14:09:44,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:09:44,725 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:44,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:44,728 INFO L225 Difference]: With dead ends: 2090 [2021-05-03 14:09:44,728 INFO L226 Difference]: Without dead ends: 2086 [2021-05-03 14:09:44,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:09:44,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-05-03 14:09:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1932. [2021-05-03 14:09:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.9047125841532884) internal successors, (5609), 1931 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 5609 transitions. [2021-05-03 14:09:44,748 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 5609 transitions. Word has length 21 [2021-05-03 14:09:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:44,748 INFO L480 AbstractCegarLoop]: Abstraction has 1932 states and 5609 transitions. [2021-05-03 14:09:44,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 5609 transitions. [2021-05-03 14:09:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:44,750 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:44,750 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:44,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16259,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:44,950 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:44,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:44,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1217034640, now seen corresponding path program 331 times [2021-05-03 14:09:44,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:44,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643603286] [2021-05-03 14:09:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:45,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643603286] [2021-05-03 14:09:45,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089681043] [2021-05-03 14:09:45,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:45,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:45,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:45,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:45,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:09:45,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330962694] [2021-05-03 14:09:45,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:45,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:45,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:45,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:45,095 INFO L87 Difference]: Start difference. First operand 1932 states and 5609 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:45,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:45,295 INFO L93 Difference]: Finished difference Result 2179 states and 6040 transitions. [2021-05-03 14:09:45,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:09:45,296 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:45,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:45,299 INFO L225 Difference]: With dead ends: 2179 [2021-05-03 14:09:45,299 INFO L226 Difference]: Without dead ends: 2173 [2021-05-03 14:09:45,299 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:09:45,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2021-05-03 14:09:45,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 1910. [2021-05-03 14:09:45,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 2.900995285489785) internal successors, (5538), 1909 states have internal predecessors, (5538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 5538 transitions. [2021-05-03 14:09:45,318 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 5538 transitions. Word has length 21 [2021-05-03 14:09:45,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:45,318 INFO L480 AbstractCegarLoop]: Abstraction has 1910 states and 5538 transitions. [2021-05-03 14:09:45,318 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) [2021-05-03 14:09:45,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 5538 transitions. [2021-05-03 14:09:45,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:45,320 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:45,320 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:45,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16260,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:45,520 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:45,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1936653967, now seen corresponding path program 332 times [2021-05-03 14:09:45,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:45,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001891321] [2021-05-03 14:09:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:45,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001891321] [2021-05-03 14:09:45,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502439541] [2021-05-03 14:09:45,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:45,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:45,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:45,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:45,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:45,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:45,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:09:45,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403213848] [2021-05-03 14:09:45,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:45,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:45,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:45,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:45,660 INFO L87 Difference]: Start difference. First operand 1910 states and 5538 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:45,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:45,791 INFO L93 Difference]: Finished difference Result 2223 states and 6180 transitions. [2021-05-03 14:09:45,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:09:45,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:45,794 INFO L225 Difference]: With dead ends: 2223 [2021-05-03 14:09:45,794 INFO L226 Difference]: Without dead ends: 2221 [2021-05-03 14:09:45,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-05-03 14:09:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1885. [2021-05-03 14:09:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 2.8959660297239913) internal successors, (5456), 1884 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:45,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 5456 transitions. [2021-05-03 14:09:45,814 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 5456 transitions. Word has length 21 [2021-05-03 14:09:45,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:45,814 INFO L480 AbstractCegarLoop]: Abstraction has 1885 states and 5456 transitions. [2021-05-03 14:09:45,814 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) [2021-05-03 14:09:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 5456 transitions. [2021-05-03 14:09:45,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:45,815 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:45,815 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:46,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16261 [2021-05-03 14:09:46,016 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:46,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:46,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1430307701, now seen corresponding path program 333 times [2021-05-03 14:09:46,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:46,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816412289] [2021-05-03 14:09:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:46,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816412289] [2021-05-03 14:09:46,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040626389] [2021-05-03 14:09:46,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:46,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:09:46,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:46,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:46,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:46,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:46,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:09:46,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129262440] [2021-05-03 14:09:46,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:46,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:46,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:46,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:46,172 INFO L87 Difference]: Start difference. First operand 1885 states and 5456 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:46,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:46,294 INFO L93 Difference]: Finished difference Result 2639 states and 7430 transitions. [2021-05-03 14:09:46,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:09:46,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:46,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:46,299 INFO L225 Difference]: With dead ends: 2639 [2021-05-03 14:09:46,299 INFO L226 Difference]: Without dead ends: 2639 [2021-05-03 14:09:46,300 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:46,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2021-05-03 14:09:46,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2332. [2021-05-03 14:09:46,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2331 states have (on average 2.891033891033891) internal successors, (6739), 2331 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 6739 transitions. [2021-05-03 14:09:46,337 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 6739 transitions. Word has length 21 [2021-05-03 14:09:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:46,337 INFO L480 AbstractCegarLoop]: Abstraction has 2332 states and 6739 transitions. [2021-05-03 14:09:46,337 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) [2021-05-03 14:09:46,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 6739 transitions. [2021-05-03 14:09:46,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:46,339 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:46,339 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:46,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16262 [2021-05-03 14:09:46,540 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:46,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:46,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1868227088, now seen corresponding path program 334 times [2021-05-03 14:09:46,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:46,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740755825] [2021-05-03 14:09:46,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:46,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740755825] [2021-05-03 14:09:46,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101576796] [2021-05-03 14:09:46,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:46,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:46,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:46,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:46,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:46,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:46,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:09:46,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293118413] [2021-05-03 14:09:46,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:46,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:46,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:46,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:46,700 INFO L87 Difference]: Start difference. First operand 2332 states and 6739 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:46,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:46,915 INFO L93 Difference]: Finished difference Result 2899 states and 8005 transitions. [2021-05-03 14:09:46,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:09:46,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:46,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:46,918 INFO L225 Difference]: With dead ends: 2899 [2021-05-03 14:09:46,918 INFO L226 Difference]: Without dead ends: 2889 [2021-05-03 14:09:46,918 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:46,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2021-05-03 14:09:46,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2339. [2021-05-03 14:09:46,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 2.8896492728828056) internal successors, (6756), 2338 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 6756 transitions. [2021-05-03 14:09:46,941 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 6756 transitions. Word has length 21 [2021-05-03 14:09:46,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:46,941 INFO L480 AbstractCegarLoop]: Abstraction has 2339 states and 6756 transitions. [2021-05-03 14:09:46,941 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) [2021-05-03 14:09:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 6756 transitions. [2021-05-03 14:09:46,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:46,943 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:46,943 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:47,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16263 [2021-05-03 14:09:47,144 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:47,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:47,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1381524657, now seen corresponding path program 335 times [2021-05-03 14:09:47,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:47,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676230310] [2021-05-03 14:09:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:47,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676230310] [2021-05-03 14:09:47,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701264575] [2021-05-03 14:09:47,220 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 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:47,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:09:47,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:47,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:47,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:47,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:47,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:09:47,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692946423] [2021-05-03 14:09:47,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:47,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:47,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:47,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:47,295 INFO L87 Difference]: Start difference. First operand 2339 states and 6756 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:47,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:47,477 INFO L93 Difference]: Finished difference Result 2784 states and 7761 transitions. [2021-05-03 14:09:47,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:09:47,478 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:47,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:47,481 INFO L225 Difference]: With dead ends: 2784 [2021-05-03 14:09:47,481 INFO L226 Difference]: Without dead ends: 2784 [2021-05-03 14:09:47,481 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:09:47,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-05-03 14:09:47,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2068. [2021-05-03 14:09:47,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.864537977745525) internal successors, (5921), 2067 states have internal predecessors, (5921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:47,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 5921 transitions. [2021-05-03 14:09:47,506 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 5921 transitions. Word has length 21 [2021-05-03 14:09:47,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:47,506 INFO L480 AbstractCegarLoop]: Abstraction has 2068 states and 5921 transitions. [2021-05-03 14:09:47,506 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) [2021-05-03 14:09:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 5921 transitions. [2021-05-03 14:09:47,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:47,508 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:47,508 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:47,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16264 [2021-05-03 14:09:47,708 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:47,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:47,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1023255636, now seen corresponding path program 336 times [2021-05-03 14:09:47,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:47,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820654627] [2021-05-03 14:09:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:47,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820654627] [2021-05-03 14:09:47,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935048217] [2021-05-03 14:09:47,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:47,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:09:47,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:47,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:47,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:47,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:47,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:09:47,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166047818] [2021-05-03 14:09:47,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:47,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:47,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:47,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:47,874 INFO L87 Difference]: Start difference. First operand 2068 states and 5921 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:48,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:48,009 INFO L93 Difference]: Finished difference Result 2495 states and 6829 transitions. [2021-05-03 14:09:48,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:09:48,010 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:48,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:48,012 INFO L225 Difference]: With dead ends: 2495 [2021-05-03 14:09:48,013 INFO L226 Difference]: Without dead ends: 2483 [2021-05-03 14:09:48,013 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:48,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-05-03 14:09:48,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2068. [2021-05-03 14:09:48,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.864054184808902) internal successors, (5920), 2067 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 5920 transitions. [2021-05-03 14:09:48,034 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 5920 transitions. Word has length 21 [2021-05-03 14:09:48,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:48,034 INFO L480 AbstractCegarLoop]: Abstraction has 2068 states and 5920 transitions. [2021-05-03 14:09:48,034 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) [2021-05-03 14:09:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 5920 transitions. [2021-05-03 14:09:48,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:48,036 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:48,036 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:48,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16265 [2021-05-03 14:09:48,237 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:48,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:48,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1645985461, now seen corresponding path program 337 times [2021-05-03 14:09:48,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:48,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216451182] [2021-05-03 14:09:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:48,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216451182] [2021-05-03 14:09:48,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405797239] [2021-05-03 14:09:48,316 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 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 [2021-05-03 14:09:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:48,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:48,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:48,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:48,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:09:48,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916594586] [2021-05-03 14:09:48,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:48,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:48,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:48,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:48,387 INFO L87 Difference]: Start difference. First operand 2068 states and 5920 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:48,678 INFO L93 Difference]: Finished difference Result 3237 states and 8989 transitions. [2021-05-03 14:09:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:09:48,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:48,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:48,683 INFO L225 Difference]: With dead ends: 3237 [2021-05-03 14:09:48,683 INFO L226 Difference]: Without dead ends: 3237 [2021-05-03 14:09:48,683 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:09:48,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3237 states. [2021-05-03 14:09:48,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3237 to 2165. [2021-05-03 14:09:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 2.863678373382625) internal successors, (6197), 2164 states have internal predecessors, (6197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 6197 transitions. [2021-05-03 14:09:48,709 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 6197 transitions. Word has length 21 [2021-05-03 14:09:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:48,709 INFO L480 AbstractCegarLoop]: Abstraction has 2165 states and 6197 transitions. [2021-05-03 14:09:48,709 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) [2021-05-03 14:09:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 6197 transitions. [2021-05-03 14:09:48,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:48,711 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:48,711 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:48,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16266,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:48,911 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:48,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:48,911 INFO L82 PathProgramCache]: Analyzing trace with hash 94608648, now seen corresponding path program 338 times [2021-05-03 14:09:48,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:48,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769417617] [2021-05-03 14:09:48,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:48,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769417617] [2021-05-03 14:09:48,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37003794] [2021-05-03 14:09:48,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:49,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:49,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:49,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:49,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:49,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:49,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:09:49,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701975711] [2021-05-03 14:09:49,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:49,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:49,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:49,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:49,064 INFO L87 Difference]: Start difference. First operand 2165 states and 6197 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:49,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:49,216 INFO L93 Difference]: Finished difference Result 2340 states and 6503 transitions. [2021-05-03 14:09:49,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:09:49,217 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:49,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:49,220 INFO L225 Difference]: With dead ends: 2340 [2021-05-03 14:09:49,220 INFO L226 Difference]: Without dead ends: 2336 [2021-05-03 14:09:49,220 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:49,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-05-03 14:09:49,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2135. [2021-05-03 14:09:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 2.8533270852858483) internal successors, (6089), 2134 states have internal predecessors, (6089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 6089 transitions. [2021-05-03 14:09:49,242 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 6089 transitions. Word has length 21 [2021-05-03 14:09:49,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:49,242 INFO L480 AbstractCegarLoop]: Abstraction has 2135 states and 6089 transitions. [2021-05-03 14:09:49,242 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) [2021-05-03 14:09:49,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 6089 transitions. [2021-05-03 14:09:49,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:49,243 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:49,243 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:49,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16267 [2021-05-03 14:09:49,444 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:49,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:49,444 INFO L82 PathProgramCache]: Analyzing trace with hash 578153513, now seen corresponding path program 339 times [2021-05-03 14:09:49,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:49,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354703252] [2021-05-03 14:09:49,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:49,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354703252] [2021-05-03 14:09:49,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141189564] [2021-05-03 14:09:49,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:49,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:09:49,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:49,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:49,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:49,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:49,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:09:49,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662774207] [2021-05-03 14:09:49,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:49,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:49,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:49,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:49,593 INFO L87 Difference]: Start difference. First operand 2135 states and 6089 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:49,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:49,846 INFO L93 Difference]: Finished difference Result 2321 states and 6379 transitions. [2021-05-03 14:09:49,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:09:49,847 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:49,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:49,849 INFO L225 Difference]: With dead ends: 2321 [2021-05-03 14:09:49,849 INFO L226 Difference]: Without dead ends: 2315 [2021-05-03 14:09:49,849 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:49,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-05-03 14:09:49,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2135. [2021-05-03 14:09:49,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 2.8509840674789126) internal successors, (6084), 2134 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:49,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 6084 transitions. [2021-05-03 14:09:49,870 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 6084 transitions. Word has length 21 [2021-05-03 14:09:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:49,870 INFO L480 AbstractCegarLoop]: Abstraction has 2135 states and 6084 transitions. [2021-05-03 14:09:49,870 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) [2021-05-03 14:09:49,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 6084 transitions. [2021-05-03 14:09:49,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:49,872 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:49,872 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:50,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16268,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:50,073 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:50,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:50,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1541604198, now seen corresponding path program 340 times [2021-05-03 14:09:50,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:50,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054611972] [2021-05-03 14:09:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:50,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054611972] [2021-05-03 14:09:50,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597533030] [2021-05-03 14:09:50,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:50,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:50,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:50,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:50,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:50,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:50,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:09:50,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045221435] [2021-05-03 14:09:50,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:50,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:50,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:50,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:50,238 INFO L87 Difference]: Start difference. First operand 2135 states and 6084 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:50,443 INFO L93 Difference]: Finished difference Result 2405 states and 6657 transitions. [2021-05-03 14:09:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:09:50,443 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:50,446 INFO L225 Difference]: With dead ends: 2405 [2021-05-03 14:09:50,446 INFO L226 Difference]: Without dead ends: 2395 [2021-05-03 14:09:50,446 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-05-03 14:09:50,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2157. [2021-05-03 14:09:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2156 states have (on average 2.8501855287569575) internal successors, (6145), 2156 states have internal predecessors, (6145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 6145 transitions. [2021-05-03 14:09:50,471 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 6145 transitions. Word has length 21 [2021-05-03 14:09:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:50,471 INFO L480 AbstractCegarLoop]: Abstraction has 2157 states and 6145 transitions. [2021-05-03 14:09:50,471 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) [2021-05-03 14:09:50,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 6145 transitions. [2021-05-03 14:09:50,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:50,473 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:50,473 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:50,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16269 [2021-05-03 14:09:50,673 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:50,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:50,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1708147547, now seen corresponding path program 341 times [2021-05-03 14:09:50,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:50,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150433357] [2021-05-03 14:09:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:50,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150433357] [2021-05-03 14:09:50,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122960821] [2021-05-03 14:09:50,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:09:50,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:09:50,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:50,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:50,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:50,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:50,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:09:50,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743768089] [2021-05-03 14:09:50,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:50,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:50,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:50,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:50,820 INFO L87 Difference]: Start difference. First operand 2157 states and 6145 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:51,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:51,003 INFO L93 Difference]: Finished difference Result 2688 states and 7467 transitions. [2021-05-03 14:09:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:09:51,004 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:51,006 INFO L225 Difference]: With dead ends: 2688 [2021-05-03 14:09:51,007 INFO L226 Difference]: Without dead ends: 2686 [2021-05-03 14:09:51,007 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:09:51,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-05-03 14:09:51,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 1554. [2021-05-03 14:09:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 2.8126207340631035) internal successors, (4368), 1553 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:51,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 4368 transitions. [2021-05-03 14:09:51,026 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 4368 transitions. Word has length 21 [2021-05-03 14:09:51,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:51,026 INFO L480 AbstractCegarLoop]: Abstraction has 1554 states and 4368 transitions. [2021-05-03 14:09:51,026 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) [2021-05-03 14:09:51,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 4368 transitions. [2021-05-03 14:09:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:51,027 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:51,027 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:51,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16270,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:51,228 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:51,228 INFO L82 PathProgramCache]: Analyzing trace with hash 696632746, now seen corresponding path program 342 times [2021-05-03 14:09:51,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:51,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110987815] [2021-05-03 14:09:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:51,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110987815] [2021-05-03 14:09:51,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180554914] [2021-05-03 14:09:51,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:51,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:09:51,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:51,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:51,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:51,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:51,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:09:51,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846822348] [2021-05-03 14:09:51,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:51,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:51,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:51,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:51,389 INFO L87 Difference]: Start difference. First operand 1554 states and 4368 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:51,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:51,559 INFO L93 Difference]: Finished difference Result 1983 states and 5292 transitions. [2021-05-03 14:09:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:09:51,560 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:51,562 INFO L225 Difference]: With dead ends: 1983 [2021-05-03 14:09:51,562 INFO L226 Difference]: Without dead ends: 1971 [2021-05-03 14:09:51,562 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:09:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-05-03 14:09:51,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1554. [2021-05-03 14:09:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 2.8106889890534448) internal successors, (4365), 1553 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:51,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 4365 transitions. [2021-05-03 14:09:51,578 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 4365 transitions. Word has length 21 [2021-05-03 14:09:51,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:51,579 INFO L480 AbstractCegarLoop]: Abstraction has 1554 states and 4365 transitions. [2021-05-03 14:09:51,579 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) [2021-05-03 14:09:51,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 4365 transitions. [2021-05-03 14:09:51,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:51,580 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:51,580 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:51,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16271 [2021-05-03 14:09:51,781 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:51,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:51,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1319362571, now seen corresponding path program 343 times [2021-05-03 14:09:51,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:51,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137135319] [2021-05-03 14:09:51,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:51,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137135319] [2021-05-03 14:09:51,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023460588] [2021-05-03 14:09:51,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:51,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:51,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:51,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:51,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:09:51,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911682190] [2021-05-03 14:09:51,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:51,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:51,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:51,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:51,929 INFO L87 Difference]: Start difference. First operand 1554 states and 4365 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:52,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:52,200 INFO L93 Difference]: Finished difference Result 2612 states and 7115 transitions. [2021-05-03 14:09:52,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:09:52,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:52,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:52,204 INFO L225 Difference]: With dead ends: 2612 [2021-05-03 14:09:52,204 INFO L226 Difference]: Without dead ends: 2612 [2021-05-03 14:09:52,205 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:09:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-05-03 14:09:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 1490. [2021-05-03 14:09:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 2.8280725319006046) internal successors, (4211), 1489 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 4211 transitions. [2021-05-03 14:09:52,223 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 4211 transitions. Word has length 21 [2021-05-03 14:09:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:52,223 INFO L480 AbstractCegarLoop]: Abstraction has 1490 states and 4211 transitions. [2021-05-03 14:09:52,223 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) [2021-05-03 14:09:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 4211 transitions. [2021-05-03 14:09:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:52,224 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:52,225 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:52,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16272,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:52,425 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:52,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:52,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1179807206, now seen corresponding path program 344 times [2021-05-03 14:09:52,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:52,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109311485] [2021-05-03 14:09:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:52,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109311485] [2021-05-03 14:09:52,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213174531] [2021-05-03 14:09:52,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:52,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:52,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:52,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:52,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:52,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:52,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:09:52,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081207985] [2021-05-03 14:09:52,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:09:52,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:52,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:09:52,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:52,562 INFO L87 Difference]: Start difference. First operand 1490 states and 4211 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:52,669 INFO L93 Difference]: Finished difference Result 1712 states and 4615 transitions. [2021-05-03 14:09:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:09:52,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:52,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:52,672 INFO L225 Difference]: With dead ends: 1712 [2021-05-03 14:09:52,672 INFO L226 Difference]: Without dead ends: 1712 [2021-05-03 14:09:52,672 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-05-03 14:09:52,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1470. [2021-05-03 14:09:52,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.821647379169503) internal successors, (4145), 1469 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4145 transitions. [2021-05-03 14:09:52,686 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4145 transitions. Word has length 21 [2021-05-03 14:09:52,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:52,686 INFO L480 AbstractCegarLoop]: Abstraction has 1470 states and 4145 transitions. [2021-05-03 14:09:52,687 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) [2021-05-03 14:09:52,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4145 transitions. [2021-05-03 14:09:52,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:52,688 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:52,688 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:52,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16273,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:52,888 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:52,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:52,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1436993883, now seen corresponding path program 345 times [2021-05-03 14:09:52,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:52,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471590546] [2021-05-03 14:09:52,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:52,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471590546] [2021-05-03 14:09:52,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204986386] [2021-05-03 14:09:52,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:52,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:09:52,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:52,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:52,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:53,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:53,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:09:53,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640688020] [2021-05-03 14:09:53,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:09:53,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:53,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:09:53,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:53,020 INFO L87 Difference]: Start difference. First operand 1470 states and 4145 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:53,195 INFO L93 Difference]: Finished difference Result 1612 states and 4366 transitions. [2021-05-03 14:09:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:09:53,195 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:53,197 INFO L225 Difference]: With dead ends: 1612 [2021-05-03 14:09:53,197 INFO L226 Difference]: Without dead ends: 1608 [2021-05-03 14:09:53,198 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:09:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-05-03 14:09:53,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1454. [2021-05-03 14:09:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 2.8183069511355816) internal successors, (4095), 1453 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:53,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4095 transitions. [2021-05-03 14:09:53,213 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4095 transitions. Word has length 21 [2021-05-03 14:09:53,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:53,213 INFO L480 AbstractCegarLoop]: Abstraction has 1454 states and 4095 transitions. [2021-05-03 14:09:53,213 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) [2021-05-03 14:09:53,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4095 transitions. [2021-05-03 14:09:53,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:53,214 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:53,214 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:53,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16274 [2021-05-03 14:09:53,414 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:53,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:53,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1062657916, now seen corresponding path program 346 times [2021-05-03 14:09:53,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:53,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424869279] [2021-05-03 14:09:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:53,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424869279] [2021-05-03 14:09:53,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038407753] [2021-05-03 14:09:53,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:53,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:53,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:53,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:53,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:53,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:53,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:09:53,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625315133] [2021-05-03 14:09:53,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:53,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:53,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:53,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:53,596 INFO L87 Difference]: Start difference. First operand 1454 states and 4095 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:53,852 INFO L93 Difference]: Finished difference Result 1781 states and 4786 transitions. [2021-05-03 14:09:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:09:53,853 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:53,855 INFO L225 Difference]: With dead ends: 1781 [2021-05-03 14:09:53,855 INFO L226 Difference]: Without dead ends: 1769 [2021-05-03 14:09:53,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:09:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-05-03 14:09:53,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1460. [2021-05-03 14:09:53,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 2.8115147361206305) internal successors, (4102), 1459 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:53,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4102 transitions. [2021-05-03 14:09:53,871 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4102 transitions. Word has length 21 [2021-05-03 14:09:53,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:53,871 INFO L480 AbstractCegarLoop]: Abstraction has 1460 states and 4102 transitions. [2021-05-03 14:09:53,871 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) [2021-05-03 14:09:53,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4102 transitions. [2021-05-03 14:09:53,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:53,873 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:53,873 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:54,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16275 [2021-05-03 14:09:54,073 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:54,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:54,074 INFO L82 PathProgramCache]: Analyzing trace with hash -439928091, now seen corresponding path program 347 times [2021-05-03 14:09:54,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:54,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060353656] [2021-05-03 14:09:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:54,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060353656] [2021-05-03 14:09:54,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019940013] [2021-05-03 14:09:54,167 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 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 [2021-05-03 14:09:54,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:09:54,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:54,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:54,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:54,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:54,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:09:54,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616859051] [2021-05-03 14:09:54,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:54,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:54,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:54,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:54,259 INFO L87 Difference]: Start difference. First operand 1460 states and 4102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:54,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:54,539 INFO L93 Difference]: Finished difference Result 1843 states and 4934 transitions. [2021-05-03 14:09:54,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:09:54,540 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:54,542 INFO L225 Difference]: With dead ends: 1843 [2021-05-03 14:09:54,542 INFO L226 Difference]: Without dead ends: 1839 [2021-05-03 14:09:54,542 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:09:54,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-05-03 14:09:54,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1157. [2021-05-03 14:09:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.7889273356401385) internal successors, (3224), 1156 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3224 transitions. [2021-05-03 14:09:54,556 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3224 transitions. Word has length 21 [2021-05-03 14:09:54,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:54,556 INFO L480 AbstractCegarLoop]: Abstraction has 1157 states and 3224 transitions. [2021-05-03 14:09:54,556 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) [2021-05-03 14:09:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3224 transitions. [2021-05-03 14:09:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:54,557 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:54,557 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:54,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16276,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:54,757 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash -2110322360, now seen corresponding path program 348 times [2021-05-03 14:09:54,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:54,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082607860] [2021-05-03 14:09:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:54,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082607860] [2021-05-03 14:09:54,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728462292] [2021-05-03 14:09:54,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:54,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:09:54,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:54,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:54,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:54,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:54,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:09:54,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614481492] [2021-05-03 14:09:54,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:09:54,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:54,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:09:54,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:54,900 INFO L87 Difference]: Start difference. First operand 1157 states and 3224 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:54,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:54,990 INFO L93 Difference]: Finished difference Result 1482 states and 3827 transitions. [2021-05-03 14:09:54,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:09:54,991 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:54,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:54,993 INFO L225 Difference]: With dead ends: 1482 [2021-05-03 14:09:54,993 INFO L226 Difference]: Without dead ends: 1482 [2021-05-03 14:09:54,993 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-05-03 14:09:55,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1173. [2021-05-03 14:09:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 2.803754266211604) internal successors, (3286), 1172 states have internal predecessors, (3286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3286 transitions. [2021-05-03 14:09:55,006 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3286 transitions. Word has length 21 [2021-05-03 14:09:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:55,006 INFO L480 AbstractCegarLoop]: Abstraction has 1173 states and 3286 transitions. [2021-05-03 14:09:55,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3286 transitions. [2021-05-03 14:09:55,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:55,007 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:55,007 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:55,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16277 [2021-05-03 14:09:55,207 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:55,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:55,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1407495337, now seen corresponding path program 349 times [2021-05-03 14:09:55,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:55,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703414811] [2021-05-03 14:09:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:55,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703414811] [2021-05-03 14:09:55,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903528474] [2021-05-03 14:09:55,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:55,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:55,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:55,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:55,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:09:55,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258626539] [2021-05-03 14:09:55,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:09:55,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:55,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:09:55,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:09:55,342 INFO L87 Difference]: Start difference. First operand 1173 states and 3286 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:55,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:55,520 INFO L93 Difference]: Finished difference Result 1332 states and 3551 transitions. [2021-05-03 14:09:55,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:09:55,520 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:55,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:55,522 INFO L225 Difference]: With dead ends: 1332 [2021-05-03 14:09:55,522 INFO L226 Difference]: Without dead ends: 1330 [2021-05-03 14:09:55,522 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:09:55,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-05-03 14:09:55,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1184. [2021-05-03 14:09:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.808114961961116) internal successors, (3322), 1183 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3322 transitions. [2021-05-03 14:09:55,533 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3322 transitions. Word has length 21 [2021-05-03 14:09:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:55,533 INFO L480 AbstractCegarLoop]: Abstraction has 1184 states and 3322 transitions. [2021-05-03 14:09:55,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3322 transitions. [2021-05-03 14:09:55,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:55,534 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:55,534 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:55,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16278,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:55,735 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:55,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:55,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1948570474, now seen corresponding path program 350 times [2021-05-03 14:09:55,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:55,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166619732] [2021-05-03 14:09:55,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:55,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166619732] [2021-05-03 14:09:55,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108330817] [2021-05-03 14:09:55,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:55,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:55,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:55,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:55,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:55,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:55,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:09:55,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54174047] [2021-05-03 14:09:55,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:09:55,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:55,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:09:55,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:55,869 INFO L87 Difference]: Start difference. First operand 1184 states and 3322 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:56,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:56,053 INFO L93 Difference]: Finished difference Result 1469 states and 3818 transitions. [2021-05-03 14:09:56,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:09:56,054 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:56,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:56,055 INFO L225 Difference]: With dead ends: 1469 [2021-05-03 14:09:56,055 INFO L226 Difference]: Without dead ends: 1463 [2021-05-03 14:09:56,055 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:56,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-05-03 14:09:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1184. [2021-05-03 14:09:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.804733727810651) internal successors, (3318), 1183 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3318 transitions. [2021-05-03 14:09:56,067 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3318 transitions. Word has length 21 [2021-05-03 14:09:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:56,067 INFO L480 AbstractCegarLoop]: Abstraction has 1184 states and 3318 transitions. [2021-05-03 14:09:56,067 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) [2021-05-03 14:09:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3318 transitions. [2021-05-03 14:09:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:56,068 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:56,068 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:56,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16279 [2021-05-03 14:09:56,268 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:56,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:56,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1057248843, now seen corresponding path program 351 times [2021-05-03 14:09:56,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:56,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963304402] [2021-05-03 14:09:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:56,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963304402] [2021-05-03 14:09:56,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689719730] [2021-05-03 14:09:56,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:56,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:09:56,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:56,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:56,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:56,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:56,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:09:56,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820610571] [2021-05-03 14:09:56,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:09:56,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:56,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:09:56,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:09:56,409 INFO L87 Difference]: Start difference. First operand 1184 states and 3318 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:56,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:56,565 INFO L93 Difference]: Finished difference Result 1448 states and 3844 transitions. [2021-05-03 14:09:56,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:09:56,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:56,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:56,568 INFO L225 Difference]: With dead ends: 1448 [2021-05-03 14:09:56,568 INFO L226 Difference]: Without dead ends: 1448 [2021-05-03 14:09:56,568 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:56,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-05-03 14:09:56,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1157. [2021-05-03 14:09:56,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.7949826989619377) internal successors, (3231), 1156 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:56,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3231 transitions. [2021-05-03 14:09:56,580 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3231 transitions. Word has length 21 [2021-05-03 14:09:56,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:56,581 INFO L480 AbstractCegarLoop]: Abstraction has 1157 states and 3231 transitions. [2021-05-03 14:09:56,581 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) [2021-05-03 14:09:56,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3231 transitions. [2021-05-03 14:09:56,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:56,582 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:56,582 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:56,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16280,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:56,782 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:56,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:56,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1969576682, now seen corresponding path program 352 times [2021-05-03 14:09:56,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:56,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574219000] [2021-05-03 14:09:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:56,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574219000] [2021-05-03 14:09:56,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642447113] [2021-05-03 14:09:56,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:56,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:56,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:56,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:56,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:56,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:56,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:09:56,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109676896] [2021-05-03 14:09:56,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:56,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:56,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:56,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:56,948 INFO L87 Difference]: Start difference. First operand 1157 states and 3231 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:57,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:57,156 INFO L93 Difference]: Finished difference Result 1462 states and 3767 transitions. [2021-05-03 14:09:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:09:57,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:57,158 INFO L225 Difference]: With dead ends: 1462 [2021-05-03 14:09:57,158 INFO L226 Difference]: Without dead ends: 1454 [2021-05-03 14:09:57,158 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:57,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-05-03 14:09:57,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1157. [2021-05-03 14:09:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.7932525951557095) internal successors, (3229), 1156 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3229 transitions. [2021-05-03 14:09:57,173 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3229 transitions. Word has length 21 [2021-05-03 14:09:57,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:57,173 INFO L480 AbstractCegarLoop]: Abstraction has 1157 states and 3229 transitions. [2021-05-03 14:09:57,173 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) [2021-05-03 14:09:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3229 transitions. [2021-05-03 14:09:57,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:57,174 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:57,174 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:57,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16281 [2021-05-03 14:09:57,375 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:57,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:57,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1088758155, now seen corresponding path program 353 times [2021-05-03 14:09:57,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:57,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855581069] [2021-05-03 14:09:57,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:57,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855581069] [2021-05-03 14:09:57,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103994340] [2021-05-03 14:09:57,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:57,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:09:57,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:57,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:57,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:57,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:57,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:09:57,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724223726] [2021-05-03 14:09:57,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:57,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:57,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:57,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:57,522 INFO L87 Difference]: Start difference. First operand 1157 states and 3229 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:57,679 INFO L93 Difference]: Finished difference Result 1409 states and 3711 transitions. [2021-05-03 14:09:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:09:57,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:57,682 INFO L225 Difference]: With dead ends: 1409 [2021-05-03 14:09:57,682 INFO L226 Difference]: Without dead ends: 1405 [2021-05-03 14:09:57,682 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:09:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-05-03 14:09:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1044. [2021-05-03 14:09:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 2.771812080536913) internal successors, (2891), 1043 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 2891 transitions. [2021-05-03 14:09:57,693 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 2891 transitions. Word has length 21 [2021-05-03 14:09:57,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:57,693 INFO L480 AbstractCegarLoop]: Abstraction has 1044 states and 2891 transitions. [2021-05-03 14:09:57,693 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) [2021-05-03 14:09:57,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 2891 transitions. [2021-05-03 14:09:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:57,694 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:57,694 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:57,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16282,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:57,894 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:57,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:57,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1723074203, now seen corresponding path program 354 times [2021-05-03 14:09:57,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:57,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569212760] [2021-05-03 14:09:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:57,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569212760] [2021-05-03 14:09:57,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873350406] [2021-05-03 14:09:57,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:58,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:09:58,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:58,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:58,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:58,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:58,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:09:58,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91900791] [2021-05-03 14:09:58,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:58,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:58,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:58,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:58,098 INFO L87 Difference]: Start difference. First operand 1044 states and 2891 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:58,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:58,226 INFO L93 Difference]: Finished difference Result 1522 states and 3994 transitions. [2021-05-03 14:09:58,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:09:58,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:58,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:58,229 INFO L225 Difference]: With dead ends: 1522 [2021-05-03 14:09:58,229 INFO L226 Difference]: Without dead ends: 1522 [2021-05-03 14:09:58,229 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:58,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-05-03 14:09:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1262. [2021-05-03 14:09:58,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 2.7731958762886597) internal successors, (3497), 1261 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3497 transitions. [2021-05-03 14:09:58,241 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3497 transitions. Word has length 21 [2021-05-03 14:09:58,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:58,241 INFO L480 AbstractCegarLoop]: Abstraction has 1262 states and 3497 transitions. [2021-05-03 14:09:58,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:58,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3497 transitions. [2021-05-03 14:09:58,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:58,242 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:58,242 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:58,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16283 [2021-05-03 14:09:58,443 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:58,443 INFO L82 PathProgramCache]: Analyzing trace with hash 681706090, now seen corresponding path program 355 times [2021-05-03 14:09:58,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:58,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373882940] [2021-05-03 14:09:58,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:58,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373882940] [2021-05-03 14:09:58,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285236621] [2021-05-03 14:09:58,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:58,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:58,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:58,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:58,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:09:58,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474092420] [2021-05-03 14:09:58,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:58,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:58,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:58,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:58,621 INFO L87 Difference]: Start difference. First operand 1262 states and 3497 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:58,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:58,861 INFO L93 Difference]: Finished difference Result 2034 states and 5233 transitions. [2021-05-03 14:09:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:09:58,862 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:58,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:58,864 INFO L225 Difference]: With dead ends: 2034 [2021-05-03 14:09:58,864 INFO L226 Difference]: Without dead ends: 2022 [2021-05-03 14:09:58,864 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:09:58,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-05-03 14:09:58,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1292. [2021-05-03 14:09:58,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 2.7683965917893105) internal successors, (3574), 1291 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 3574 transitions. [2021-05-03 14:09:58,879 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 3574 transitions. Word has length 21 [2021-05-03 14:09:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:58,879 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 3574 transitions. [2021-05-03 14:09:58,879 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) [2021-05-03 14:09:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 3574 transitions. [2021-05-03 14:09:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:58,880 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:58,880 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:59,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16284,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:59,080 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:59,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:59,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1304435915, now seen corresponding path program 356 times [2021-05-03 14:09:59,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:59,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994512447] [2021-05-03 14:09:59,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:59,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994512447] [2021-05-03 14:09:59,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528352090] [2021-05-03 14:09:59,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:59,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:59,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:59,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:59,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:59,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:59,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:09:59,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837005998] [2021-05-03 14:09:59,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:59,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:59,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:59,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:59,252 INFO L87 Difference]: Start difference. First operand 1292 states and 3574 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:59,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:59,493 INFO L93 Difference]: Finished difference Result 1611 states and 4182 transitions. [2021-05-03 14:09:59,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:09:59,494 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:09:59,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:59,496 INFO L225 Difference]: With dead ends: 1611 [2021-05-03 14:09:59,496 INFO L226 Difference]: Without dead ends: 1611 [2021-05-03 14:09:59,496 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:09:59,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-05-03 14:09:59,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1257. [2021-05-03 14:09:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 2.7619426751592355) internal successors, (3469), 1256 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 3469 transitions. [2021-05-03 14:09:59,510 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 3469 transitions. Word has length 21 [2021-05-03 14:09:59,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:59,510 INFO L480 AbstractCegarLoop]: Abstraction has 1257 states and 3469 transitions. [2021-05-03 14:09:59,510 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) [2021-05-03 14:09:59,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 3469 transitions. [2021-05-03 14:09:59,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:09:59,511 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:59,511 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:59,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16285 [2021-05-03 14:09:59,712 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:59,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:59,712 INFO L82 PathProgramCache]: Analyzing trace with hash 257394854, now seen corresponding path program 357 times [2021-05-03 14:09:59,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:59,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734467597] [2021-05-03 14:09:59,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:59,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734467597] [2021-05-03 14:09:59,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620934958] [2021-05-03 14:09:59,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:59,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:09:59,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:59,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:09:59,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:59,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:59,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:09:59,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558922369] [2021-05-03 14:09:59,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:59,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:59,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:59,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:59,894 INFO L87 Difference]: Start difference. First operand 1257 states and 3469 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:00,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:00,036 INFO L93 Difference]: Finished difference Result 1884 states and 4813 transitions. [2021-05-03 14:10:00,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:10:00,037 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:00,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:00,038 INFO L225 Difference]: With dead ends: 1884 [2021-05-03 14:10:00,038 INFO L226 Difference]: Without dead ends: 1870 [2021-05-03 14:10:00,039 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:00,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-05-03 14:10:00,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1262. [2021-05-03 14:10:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 2.7573354480570975) internal successors, (3477), 1261 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3477 transitions. [2021-05-03 14:10:00,051 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3477 transitions. Word has length 21 [2021-05-03 14:10:00,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:00,051 INFO L480 AbstractCegarLoop]: Abstraction has 1262 states and 3477 transitions. [2021-05-03 14:10:00,051 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) [2021-05-03 14:10:00,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3477 transitions. [2021-05-03 14:10:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:00,052 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:00,052 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:00,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16286,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:00,252 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:00,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:00,253 INFO L82 PathProgramCache]: Analyzing trace with hash 667969061, now seen corresponding path program 358 times [2021-05-03 14:10:00,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:00,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105878353] [2021-05-03 14:10:00,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:00,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105878353] [2021-05-03 14:10:00,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999512386] [2021-05-03 14:10:00,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:00,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:00,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:00,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:00,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:00,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:00,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:10:00,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705396488] [2021-05-03 14:10:00,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:00,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:00,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:00,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:00,430 INFO L87 Difference]: Start difference. First operand 1262 states and 3477 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:00,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:00,741 INFO L93 Difference]: Finished difference Result 1832 states and 4763 transitions. [2021-05-03 14:10:00,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:10:00,742 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:00,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:00,744 INFO L225 Difference]: With dead ends: 1832 [2021-05-03 14:10:00,744 INFO L226 Difference]: Without dead ends: 1832 [2021-05-03 14:10:00,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=376, Invalid=746, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:10:00,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-05-03 14:10:00,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1349. [2021-05-03 14:10:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 2.770771513353116) internal successors, (3735), 1348 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 3735 transitions. [2021-05-03 14:10:00,757 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 3735 transitions. Word has length 21 [2021-05-03 14:10:00,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:00,757 INFO L480 AbstractCegarLoop]: Abstraction has 1349 states and 3735 transitions. [2021-05-03 14:10:00,757 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) [2021-05-03 14:10:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 3735 transitions. [2021-05-03 14:10:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:00,759 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:00,759 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:00,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16287 [2021-05-03 14:10:00,968 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:00,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:00,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1440766350, now seen corresponding path program 359 times [2021-05-03 14:10:00,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:00,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646533676] [2021-05-03 14:10:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:01,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646533676] [2021-05-03 14:10:01,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077765107] [2021-05-03 14:10:01,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:01,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:10:01,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:01,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:01,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:01,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:01,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:10:01,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756517566] [2021-05-03 14:10:01,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:10:01,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:01,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:10:01,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:10:01,162 INFO L87 Difference]: Start difference. First operand 1349 states and 3735 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:01,356 INFO L93 Difference]: Finished difference Result 1621 states and 4225 transitions. [2021-05-03 14:10:01,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:10:01,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:01,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:01,359 INFO L225 Difference]: With dead ends: 1621 [2021-05-03 14:10:01,359 INFO L226 Difference]: Without dead ends: 1617 [2021-05-03 14:10:01,359 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:01,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-05-03 14:10:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1383. [2021-05-03 14:10:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 2.7836468885672936) internal successors, (3847), 1382 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:01,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 3847 transitions. [2021-05-03 14:10:01,374 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 3847 transitions. Word has length 21 [2021-05-03 14:10:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:01,374 INFO L480 AbstractCegarLoop]: Abstraction has 1383 states and 3847 transitions. [2021-05-03 14:10:01,374 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) [2021-05-03 14:10:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 3847 transitions. [2021-05-03 14:10:01,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:01,376 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:01,376 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:01,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16288 [2021-05-03 14:10:01,577 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:01,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:01,578 INFO L82 PathProgramCache]: Analyzing trace with hash -957221485, now seen corresponding path program 360 times [2021-05-03 14:10:01,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:01,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207463126] [2021-05-03 14:10:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:01,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207463126] [2021-05-03 14:10:01,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100404403] [2021-05-03 14:10:01,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:01,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:10:01,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:01,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:01,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:01,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:01,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:10:01,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197028494] [2021-05-03 14:10:01,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:10:01,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:01,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:10:01,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:10:01,774 INFO L87 Difference]: Start difference. First operand 1383 states and 3847 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:02,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:02,120 INFO L93 Difference]: Finished difference Result 1662 states and 4335 transitions. [2021-05-03 14:10:02,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:10:02,121 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:02,123 INFO L225 Difference]: With dead ends: 1662 [2021-05-03 14:10:02,123 INFO L226 Difference]: Without dead ends: 1656 [2021-05-03 14:10:02,123 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 268.5ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:10:02,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-05-03 14:10:02,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1398. [2021-05-03 14:10:02,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.7931281317108088) internal successors, (3902), 1397 states have internal predecessors, (3902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 3902 transitions. [2021-05-03 14:10:02,139 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 3902 transitions. Word has length 21 [2021-05-03 14:10:02,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:02,139 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 3902 transitions. [2021-05-03 14:10:02,139 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) [2021-05-03 14:10:02,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 3902 transitions. [2021-05-03 14:10:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:02,140 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:02,140 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:02,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16289 [2021-05-03 14:10:02,341 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:02,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:02,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1489231728, now seen corresponding path program 361 times [2021-05-03 14:10:02,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:02,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527212912] [2021-05-03 14:10:02,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:02,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527212912] [2021-05-03 14:10:02,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009884231] [2021-05-03 14:10:02,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:02,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:02,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:02,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:02,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:10:02,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452513283] [2021-05-03 14:10:02,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:10:02,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:02,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:10:02,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:10:02,490 INFO L87 Difference]: Start difference. First operand 1398 states and 3902 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:02,676 INFO L93 Difference]: Finished difference Result 1568 states and 4165 transitions. [2021-05-03 14:10:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:10:02,677 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:02,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:02,679 INFO L225 Difference]: With dead ends: 1568 [2021-05-03 14:10:02,679 INFO L226 Difference]: Without dead ends: 1566 [2021-05-03 14:10:02,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:10:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-05-03 14:10:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1398. [2021-05-03 14:10:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.7924123120973516) internal successors, (3901), 1397 states have internal predecessors, (3901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 3901 transitions. [2021-05-03 14:10:02,695 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 3901 transitions. Word has length 21 [2021-05-03 14:10:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:02,695 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 3901 transitions. [2021-05-03 14:10:02,695 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) [2021-05-03 14:10:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 3901 transitions. [2021-05-03 14:10:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:02,696 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:02,696 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:02,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16290 [2021-05-03 14:10:02,897 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:02,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1169711439, now seen corresponding path program 362 times [2021-05-03 14:10:02,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:02,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266186655] [2021-05-03 14:10:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:02,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266186655] [2021-05-03 14:10:02,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649603041] [2021-05-03 14:10:02,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:03,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:03,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:03,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:03,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:03,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:03,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:10:03,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877055043] [2021-05-03 14:10:03,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:10:03,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:03,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:10:03,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:10:03,072 INFO L87 Difference]: Start difference. First operand 1398 states and 3901 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:03,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:03,203 INFO L93 Difference]: Finished difference Result 1703 states and 4442 transitions. [2021-05-03 14:10:03,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:10:03,204 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:03,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:03,206 INFO L225 Difference]: With dead ends: 1703 [2021-05-03 14:10:03,207 INFO L226 Difference]: Without dead ends: 1703 [2021-05-03 14:10:03,207 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:10:03,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-05-03 14:10:03,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1399. [2021-05-03 14:10:03,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 2.78826895565093) internal successors, (3898), 1398 states have internal predecessors, (3898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:03,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 3898 transitions. [2021-05-03 14:10:03,222 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 3898 transitions. Word has length 21 [2021-05-03 14:10:03,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:03,222 INFO L480 AbstractCegarLoop]: Abstraction has 1399 states and 3898 transitions. [2021-05-03 14:10:03,223 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) [2021-05-03 14:10:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 3898 transitions. [2021-05-03 14:10:03,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:03,224 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:03,224 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:03,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16291,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:03,424 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:03,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:03,425 INFO L82 PathProgramCache]: Analyzing trace with hash -853668908, now seen corresponding path program 363 times [2021-05-03 14:10:03,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:03,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812452693] [2021-05-03 14:10:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:03,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:03,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812452693] [2021-05-03 14:10:03,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150941266] [2021-05-03 14:10:03,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:03,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:10:03,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:03,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:03,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:03,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:03,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:10:03,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964720907] [2021-05-03 14:10:03,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:03,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:03,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:03,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:03,580 INFO L87 Difference]: Start difference. First operand 1399 states and 3898 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:03,812 INFO L93 Difference]: Finished difference Result 1746 states and 4637 transitions. [2021-05-03 14:10:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:10:03,812 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:03,814 INFO L225 Difference]: With dead ends: 1746 [2021-05-03 14:10:03,814 INFO L226 Difference]: Without dead ends: 1734 [2021-05-03 14:10:03,815 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:10:03,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-05-03 14:10:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1419. [2021-05-03 14:10:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 2.796191819464034) internal successors, (3965), 1418 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 3965 transitions. [2021-05-03 14:10:03,829 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 3965 transitions. Word has length 21 [2021-05-03 14:10:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:03,829 INFO L480 AbstractCegarLoop]: Abstraction has 1419 states and 3965 transitions. [2021-05-03 14:10:03,829 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) [2021-05-03 14:10:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 3965 transitions. [2021-05-03 14:10:03,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:03,830 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:03,831 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:04,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16292 [2021-05-03 14:10:04,031 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:04,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:04,031 INFO L82 PathProgramCache]: Analyzing trace with hash -230939083, now seen corresponding path program 364 times [2021-05-03 14:10:04,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:04,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722333390] [2021-05-03 14:10:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:04,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722333390] [2021-05-03 14:10:04,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039460477] [2021-05-03 14:10:04,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:04,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:04,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:04,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:04,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:04,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:04,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:10:04,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686746026] [2021-05-03 14:10:04,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:04,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:04,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:04,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:04,202 INFO L87 Difference]: Start difference. First operand 1419 states and 3965 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:04,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:04,437 INFO L93 Difference]: Finished difference Result 1714 states and 4627 transitions. [2021-05-03 14:10:04,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:10:04,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:04,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:04,440 INFO L225 Difference]: With dead ends: 1714 [2021-05-03 14:10:04,440 INFO L226 Difference]: Without dead ends: 1710 [2021-05-03 14:10:04,440 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:10:04,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-05-03 14:10:04,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1352. [2021-05-03 14:10:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 2.7860843819393044) internal successors, (3764), 1351 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:04,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 3764 transitions. [2021-05-03 14:10:04,455 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 3764 transitions. Word has length 21 [2021-05-03 14:10:04,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:04,455 INFO L480 AbstractCegarLoop]: Abstraction has 1352 states and 3764 transitions. [2021-05-03 14:10:04,455 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) [2021-05-03 14:10:04,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 3764 transitions. [2021-05-03 14:10:04,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:04,456 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:04,456 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:04,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16293,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:04,656 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:04,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:04,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1277980144, now seen corresponding path program 365 times [2021-05-03 14:10:04,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:04,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506025632] [2021-05-03 14:10:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:04,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:04,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506025632] [2021-05-03 14:10:04,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988281794] [2021-05-03 14:10:04,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:04,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:10:04,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:04,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:04,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:04,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:04,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:10:04,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002076830] [2021-05-03 14:10:04,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:04,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:04,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:04,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:04,831 INFO L87 Difference]: Start difference. First operand 1352 states and 3764 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:05,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:05,030 INFO L93 Difference]: Finished difference Result 1892 states and 4939 transitions. [2021-05-03 14:10:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:10:05,031 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:05,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:05,033 INFO L225 Difference]: With dead ends: 1892 [2021-05-03 14:10:05,033 INFO L226 Difference]: Without dead ends: 1878 [2021-05-03 14:10:05,033 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:10:05,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2021-05-03 14:10:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1354. [2021-05-03 14:10:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 2.785661492978566) internal successors, (3769), 1353 states have internal predecessors, (3769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 3769 transitions. [2021-05-03 14:10:05,048 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 3769 transitions. Word has length 21 [2021-05-03 14:10:05,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:05,048 INFO L480 AbstractCegarLoop]: Abstraction has 1354 states and 3769 transitions. [2021-05-03 14:10:05,048 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) [2021-05-03 14:10:05,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 3769 transitions. [2021-05-03 14:10:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:05,050 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:05,050 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:05,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16294,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:05,250 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:05,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:05,250 INFO L82 PathProgramCache]: Analyzing trace with hash -867405937, now seen corresponding path program 366 times [2021-05-03 14:10:05,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:05,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951838188] [2021-05-03 14:10:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:05,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951838188] [2021-05-03 14:10:05,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35684263] [2021-05-03 14:10:05,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:05,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:10:05,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:05,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:05,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:05,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:05,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:10:05,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998067222] [2021-05-03 14:10:05,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:05,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:05,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:05,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:05,454 INFO L87 Difference]: Start difference. First operand 1354 states and 3769 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:05,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:05,785 INFO L93 Difference]: Finished difference Result 1810 states and 4802 transitions. [2021-05-03 14:10:05,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:10:05,786 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:05,788 INFO L225 Difference]: With dead ends: 1810 [2021-05-03 14:10:05,788 INFO L226 Difference]: Without dead ends: 1810 [2021-05-03 14:10:05,789 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 300.9ms TimeCoverageRelationStatistics Valid=356, Invalid=700, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:10:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-05-03 14:10:05,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1323. [2021-05-03 14:10:05,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 2.793494704992436) internal successors, (3693), 1322 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 3693 transitions. [2021-05-03 14:10:05,803 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 3693 transitions. Word has length 21 [2021-05-03 14:10:05,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:05,804 INFO L480 AbstractCegarLoop]: Abstraction has 1323 states and 3693 transitions. [2021-05-03 14:10:05,804 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) [2021-05-03 14:10:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 3693 transitions. [2021-05-03 14:10:05,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:05,805 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:05,805 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:06,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16295 [2021-05-03 14:10:06,005 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:06,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:06,005 INFO L82 PathProgramCache]: Analyzing trace with hash 940996534, now seen corresponding path program 367 times [2021-05-03 14:10:06,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:06,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99008665] [2021-05-03 14:10:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:06,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99008665] [2021-05-03 14:10:06,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147311843] [2021-05-03 14:10:06,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:06,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:06,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:06,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:06,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:10:06,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272058265] [2021-05-03 14:10:06,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:10:06,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:06,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:10:06,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:10:06,161 INFO L87 Difference]: Start difference. First operand 1323 states and 3693 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:06,320 INFO L93 Difference]: Finished difference Result 1696 states and 4444 transitions. [2021-05-03 14:10:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:10:06,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:06,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:06,323 INFO L225 Difference]: With dead ends: 1696 [2021-05-03 14:10:06,323 INFO L226 Difference]: Without dead ends: 1696 [2021-05-03 14:10:06,324 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:06,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-05-03 14:10:06,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1401. [2021-05-03 14:10:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 2.8235714285714284) internal successors, (3953), 1400 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 3953 transitions. [2021-05-03 14:10:06,338 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 3953 transitions. Word has length 21 [2021-05-03 14:10:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:06,338 INFO L480 AbstractCegarLoop]: Abstraction has 1401 states and 3953 transitions. [2021-05-03 14:10:06,338 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) [2021-05-03 14:10:06,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 3953 transitions. [2021-05-03 14:10:06,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:06,340 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:06,340 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:06,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16296,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:06,540 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:06,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:06,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1675804555, now seen corresponding path program 368 times [2021-05-03 14:10:06,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:06,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108602078] [2021-05-03 14:10:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:06,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108602078] [2021-05-03 14:10:06,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365005281] [2021-05-03 14:10:06,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:06,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:06,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:06,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:06,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:06,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:06,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:10:06,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215732431] [2021-05-03 14:10:06,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:10:06,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:06,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:10:06,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:10:06,701 INFO L87 Difference]: Start difference. First operand 1401 states and 3953 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:06,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:06,958 INFO L93 Difference]: Finished difference Result 1640 states and 4370 transitions. [2021-05-03 14:10:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:10:06,959 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:06,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:06,961 INFO L225 Difference]: With dead ends: 1640 [2021-05-03 14:10:06,961 INFO L226 Difference]: Without dead ends: 1636 [2021-05-03 14:10:06,961 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:10:06,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-05-03 14:10:06,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1419. [2021-05-03 14:10:06,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 2.8314527503526095) internal successors, (4015), 1418 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4015 transitions. [2021-05-03 14:10:06,976 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4015 transitions. Word has length 21 [2021-05-03 14:10:06,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:06,976 INFO L480 AbstractCegarLoop]: Abstraction has 1419 states and 4015 transitions. [2021-05-03 14:10:06,976 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) [2021-05-03 14:10:06,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4015 transitions. [2021-05-03 14:10:06,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:06,978 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:06,978 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:07,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16297 [2021-05-03 14:10:07,178 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:07,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:07,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1134729418, now seen corresponding path program 369 times [2021-05-03 14:10:07,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:07,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260253422] [2021-05-03 14:10:07,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:07,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260253422] [2021-05-03 14:10:07,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890682132] [2021-05-03 14:10:07,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:07,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:10:07,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:07,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:07,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:07,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:07,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:10:07,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893598528] [2021-05-03 14:10:07,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:10:07,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:07,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:10:07,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:10:07,299 INFO L87 Difference]: Start difference. First operand 1419 states and 4015 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:07,477 INFO L93 Difference]: Finished difference Result 1665 states and 4422 transitions. [2021-05-03 14:10:07,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:10:07,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:07,487 INFO L225 Difference]: With dead ends: 1665 [2021-05-03 14:10:07,487 INFO L226 Difference]: Without dead ends: 1663 [2021-05-03 14:10:07,488 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:10:07,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-05-03 14:10:07,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1419. [2021-05-03 14:10:07,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 2.830042313117066) internal successors, (4013), 1418 states have internal predecessors, (4013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:07,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4013 transitions. [2021-05-03 14:10:07,503 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4013 transitions. Word has length 21 [2021-05-03 14:10:07,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:07,503 INFO L480 AbstractCegarLoop]: Abstraction has 1419 states and 4013 transitions. [2021-05-03 14:10:07,503 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) [2021-05-03 14:10:07,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4013 transitions. [2021-05-03 14:10:07,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:07,504 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:07,504 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:07,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16298 [2021-05-03 14:10:07,705 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:07,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:07,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1524213749, now seen corresponding path program 370 times [2021-05-03 14:10:07,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:07,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482335817] [2021-05-03 14:10:07,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:07,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482335817] [2021-05-03 14:10:07,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136373094] [2021-05-03 14:10:07,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:07,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:07,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:07,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:07,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:07,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:07,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:10:07,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143478328] [2021-05-03 14:10:07,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:10:07,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:07,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:10:07,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:10:07,835 INFO L87 Difference]: Start difference. First operand 1419 states and 4013 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:07,940 INFO L93 Difference]: Finished difference Result 1795 states and 4748 transitions. [2021-05-03 14:10:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:10:07,941 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:07,943 INFO L225 Difference]: With dead ends: 1795 [2021-05-03 14:10:07,943 INFO L226 Difference]: Without dead ends: 1795 [2021-05-03 14:10:07,943 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:10:07,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2021-05-03 14:10:07,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1431. [2021-05-03 14:10:07,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 2.827972027972028) internal successors, (4044), 1430 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:07,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4044 transitions. [2021-05-03 14:10:07,958 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4044 transitions. Word has length 21 [2021-05-03 14:10:07,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:07,958 INFO L480 AbstractCegarLoop]: Abstraction has 1431 states and 4044 transitions. [2021-05-03 14:10:07,959 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) [2021-05-03 14:10:07,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4044 transitions. [2021-05-03 14:10:07,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:07,960 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:07,960 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:08,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16299,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:08,160 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:08,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:08,161 INFO L82 PathProgramCache]: Analyzing trace with hash 18584182, now seen corresponding path program 371 times [2021-05-03 14:10:08,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:08,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007231093] [2021-05-03 14:10:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:08,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007231093] [2021-05-03 14:10:08,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104274810] [2021-05-03 14:10:08,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:08,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:10:08,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:08,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:08,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:08,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:08,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:10:08,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859792076] [2021-05-03 14:10:08,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:08,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:08,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:08,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:08,339 INFO L87 Difference]: Start difference. First operand 1431 states and 4044 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:08,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:08,568 INFO L93 Difference]: Finished difference Result 1934 states and 5102 transitions. [2021-05-03 14:10:08,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:10:08,569 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:08,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:08,571 INFO L225 Difference]: With dead ends: 1934 [2021-05-03 14:10:08,571 INFO L226 Difference]: Without dead ends: 1920 [2021-05-03 14:10:08,571 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:10:08,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-05-03 14:10:08,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1431. [2021-05-03 14:10:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 2.827272727272727) internal successors, (4043), 1430 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:08,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4043 transitions. [2021-05-03 14:10:08,587 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4043 transitions. Word has length 21 [2021-05-03 14:10:08,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:08,587 INFO L480 AbstractCegarLoop]: Abstraction has 1431 states and 4043 transitions. [2021-05-03 14:10:08,587 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) [2021-05-03 14:10:08,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4043 transitions. [2021-05-03 14:10:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:08,588 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:08,588 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:08,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16300 [2021-05-03 14:10:08,789 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:08,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:08,789 INFO L82 PathProgramCache]: Analyzing trace with hash 429158389, now seen corresponding path program 372 times [2021-05-03 14:10:08,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:08,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265246538] [2021-05-03 14:10:08,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:08,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265246538] [2021-05-03 14:10:08,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934301431] [2021-05-03 14:10:08,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:08,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:10:08,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:08,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:08,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:08,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:08,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:10:08,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273994452] [2021-05-03 14:10:08,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:08,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:08,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:08,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:08,970 INFO L87 Difference]: Start difference. First operand 1431 states and 4043 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:09,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:09,256 INFO L93 Difference]: Finished difference Result 1818 states and 4976 transitions. [2021-05-03 14:10:09,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:10:09,257 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:09,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:09,260 INFO L225 Difference]: With dead ends: 1818 [2021-05-03 14:10:09,260 INFO L226 Difference]: Without dead ends: 1818 [2021-05-03 14:10:09,260 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 251.2ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:10:09,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2021-05-03 14:10:09,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1629. [2021-05-03 14:10:09,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 2.8316953316953315) internal successors, (4610), 1628 states have internal predecessors, (4610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 4610 transitions. [2021-05-03 14:10:09,283 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 4610 transitions. Word has length 21 [2021-05-03 14:10:09,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:09,284 INFO L480 AbstractCegarLoop]: Abstraction has 1629 states and 4610 transitions. [2021-05-03 14:10:09,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:09,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 4610 transitions. [2021-05-03 14:10:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:09,285 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:09,285 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:09,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16301 [2021-05-03 14:10:09,486 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:09,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:09,486 INFO L82 PathProgramCache]: Analyzing trace with hash 186543602, now seen corresponding path program 373 times [2021-05-03 14:10:09,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:09,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989064912] [2021-05-03 14:10:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:09,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989064912] [2021-05-03 14:10:09,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773999528] [2021-05-03 14:10:09,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:09,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:09,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:09,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:09,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:10:09,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306216333] [2021-05-03 14:10:09,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:10:09,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:09,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:10:09,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:10:09,629 INFO L87 Difference]: Start difference. First operand 1629 states and 4610 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:09,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:09,726 INFO L93 Difference]: Finished difference Result 2167 states and 5841 transitions. [2021-05-03 14:10:09,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:10:09,727 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:09,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:09,730 INFO L225 Difference]: With dead ends: 2167 [2021-05-03 14:10:09,730 INFO L226 Difference]: Without dead ends: 2167 [2021-05-03 14:10:09,730 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:10:09,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2021-05-03 14:10:09,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1854. [2021-05-03 14:10:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1853 states have (on average 2.870480302212628) internal successors, (5319), 1853 states have internal predecessors, (5319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 5319 transitions. [2021-05-03 14:10:09,750 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 5319 transitions. Word has length 21 [2021-05-03 14:10:09,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:09,750 INFO L480 AbstractCegarLoop]: Abstraction has 1854 states and 5319 transitions. [2021-05-03 14:10:09,750 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) [2021-05-03 14:10:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 5319 transitions. [2021-05-03 14:10:09,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:09,752 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:09,752 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:09,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16302 [2021-05-03 14:10:09,953 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:09,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:09,953 INFO L82 PathProgramCache]: Analyzing trace with hash -590605997, now seen corresponding path program 374 times [2021-05-03 14:10:09,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:09,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545426444] [2021-05-03 14:10:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:10,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545426444] [2021-05-03 14:10:10,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334239473] [2021-05-03 14:10:10,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:10,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:10,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:10,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:10,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:10,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:10,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:10:10,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706898687] [2021-05-03 14:10:10,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:10:10,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:10,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:10:10,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:10:10,124 INFO L87 Difference]: Start difference. First operand 1854 states and 5319 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:10,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:10,352 INFO L93 Difference]: Finished difference Result 2069 states and 5690 transitions. [2021-05-03 14:10:10,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:10:10,353 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:10,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:10,356 INFO L225 Difference]: With dead ends: 2069 [2021-05-03 14:10:10,356 INFO L226 Difference]: Without dead ends: 2067 [2021-05-03 14:10:10,356 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:10:10,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-05-03 14:10:10,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1876. [2021-05-03 14:10:10,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.8789333333333333) internal successors, (5398), 1875 states have internal predecessors, (5398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:10,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5398 transitions. [2021-05-03 14:10:10,376 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5398 transitions. Word has length 21 [2021-05-03 14:10:10,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:10,376 INFO L480 AbstractCegarLoop]: Abstraction has 1876 states and 5398 transitions. [2021-05-03 14:10:10,376 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) [2021-05-03 14:10:10,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5398 transitions. [2021-05-03 14:10:10,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:10,378 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:10,378 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:10,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16303,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:10,581 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:10,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:10,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1538935856, now seen corresponding path program 375 times [2021-05-03 14:10:10,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:10,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568712120] [2021-05-03 14:10:10,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:10,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568712120] [2021-05-03 14:10:10,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914096256] [2021-05-03 14:10:10,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:10,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:10:10,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:10,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:10,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:10,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:10,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:10:10,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569809776] [2021-05-03 14:10:10,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:10:10,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:10,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:10:10,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:10:10,723 INFO L87 Difference]: Start difference. First operand 1876 states and 5398 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:10,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:10,914 INFO L93 Difference]: Finished difference Result 2160 states and 5868 transitions. [2021-05-03 14:10:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:10:10,915 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:10,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:10,917 INFO L225 Difference]: With dead ends: 2160 [2021-05-03 14:10:10,917 INFO L226 Difference]: Without dead ends: 2158 [2021-05-03 14:10:10,917 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:10:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-05-03 14:10:10,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1876. [2021-05-03 14:10:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.8784) internal successors, (5397), 1875 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:10,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5397 transitions. [2021-05-03 14:10:10,938 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5397 transitions. Word has length 21 [2021-05-03 14:10:10,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:10,938 INFO L480 AbstractCegarLoop]: Abstraction has 1876 states and 5397 transitions. [2021-05-03 14:10:10,938 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) [2021-05-03 14:10:10,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5397 transitions. [2021-05-03 14:10:10,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:10,940 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:10,940 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:11,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16304,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:11,145 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:11,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:11,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1120007311, now seen corresponding path program 376 times [2021-05-03 14:10:11,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:11,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090012310] [2021-05-03 14:10:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:11,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090012310] [2021-05-03 14:10:11,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932198231] [2021-05-03 14:10:11,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:11,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:11,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:11,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:11,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:11,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:11,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:10:11,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703645208] [2021-05-03 14:10:11,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:10:11,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:11,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:10:11,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:10:11,324 INFO L87 Difference]: Start difference. First operand 1876 states and 5397 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:11,482 INFO L93 Difference]: Finished difference Result 2164 states and 5944 transitions. [2021-05-03 14:10:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:10:11,483 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:11,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:11,486 INFO L225 Difference]: With dead ends: 2164 [2021-05-03 14:10:11,486 INFO L226 Difference]: Without dead ends: 2164 [2021-05-03 14:10:11,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:10:11,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-05-03 14:10:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1880. [2021-05-03 14:10:11,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.8786588610963277) internal successors, (5409), 1879 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:11,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 5409 transitions. [2021-05-03 14:10:11,509 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 5409 transitions. Word has length 21 [2021-05-03 14:10:11,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:11,509 INFO L480 AbstractCegarLoop]: Abstraction has 1880 states and 5409 transitions. [2021-05-03 14:10:11,509 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) [2021-05-03 14:10:11,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 5409 transitions. [2021-05-03 14:10:11,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:11,510 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:11,511 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:11,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16305,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:11,712 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:11,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:11,712 INFO L82 PathProgramCache]: Analyzing trace with hash -49530860, now seen corresponding path program 377 times [2021-05-03 14:10:11,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:11,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366234873] [2021-05-03 14:10:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:11,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366234873] [2021-05-03 14:10:11,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463446391] [2021-05-03 14:10:11,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:11,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:10:11,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:11,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:11,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:11,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:10:11,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523348345] [2021-05-03 14:10:11,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:10:11,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:11,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:10:11,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:10:11,853 INFO L87 Difference]: Start difference. First operand 1880 states and 5409 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:12,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:12,048 INFO L93 Difference]: Finished difference Result 2226 states and 6044 transitions. [2021-05-03 14:10:12,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:10:12,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:12,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:12,052 INFO L225 Difference]: With dead ends: 2226 [2021-05-03 14:10:12,052 INFO L226 Difference]: Without dead ends: 2222 [2021-05-03 14:10:12,052 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:10:12,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-05-03 14:10:12,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1880. [2021-05-03 14:10:12,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.87812666311868) internal successors, (5408), 1879 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 5408 transitions. [2021-05-03 14:10:12,074 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 5408 transitions. Word has length 21 [2021-05-03 14:10:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:12,074 INFO L480 AbstractCegarLoop]: Abstraction has 1880 states and 5408 transitions. [2021-05-03 14:10:12,074 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) [2021-05-03 14:10:12,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 5408 transitions. [2021-05-03 14:10:12,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:12,076 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:12,077 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:12,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16306,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:12,279 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:12,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:12,279 INFO L82 PathProgramCache]: Analyzing trace with hash -940852491, now seen corresponding path program 378 times [2021-05-03 14:10:12,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:12,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437883747] [2021-05-03 14:10:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:12,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437883747] [2021-05-03 14:10:12,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393490656] [2021-05-03 14:10:12,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:12,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:10:12,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:12,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:12,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:12,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:12,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:10:12,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651002714] [2021-05-03 14:10:12,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:10:12,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:12,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:10:12,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:10:12,432 INFO L87 Difference]: Start difference. First operand 1880 states and 5408 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:12,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:12,618 INFO L93 Difference]: Finished difference Result 2131 states and 5923 transitions. [2021-05-03 14:10:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:10:12,619 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:12,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:12,621 INFO L225 Difference]: With dead ends: 2131 [2021-05-03 14:10:12,622 INFO L226 Difference]: Without dead ends: 2131 [2021-05-03 14:10:12,622 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:10:12,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-05-03 14:10:12,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1896. [2021-05-03 14:10:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 2.880738786279683) internal successors, (5459), 1895 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 5459 transitions. [2021-05-03 14:10:12,641 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 5459 transitions. Word has length 21 [2021-05-03 14:10:12,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:12,642 INFO L480 AbstractCegarLoop]: Abstraction has 1896 states and 5459 transitions. [2021-05-03 14:10:12,642 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) [2021-05-03 14:10:12,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 5459 transitions. [2021-05-03 14:10:12,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:12,643 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:12,643 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:12,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16307 [2021-05-03 14:10:12,844 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:12,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:12,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1122616240, now seen corresponding path program 379 times [2021-05-03 14:10:12,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:12,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613061549] [2021-05-03 14:10:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:12,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613061549] [2021-05-03 14:10:12,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454694689] [2021-05-03 14:10:12,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:12,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:12,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:12,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:12,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:10:12,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260025847] [2021-05-03 14:10:12,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:10:12,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:12,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:10:12,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:10:12,989 INFO L87 Difference]: Start difference. First operand 1896 states and 5459 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:13,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:13,208 INFO L93 Difference]: Finished difference Result 2262 states and 6134 transitions. [2021-05-03 14:10:13,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:10:13,218 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:13,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:13,221 INFO L225 Difference]: With dead ends: 2262 [2021-05-03 14:10:13,221 INFO L226 Difference]: Without dead ends: 2256 [2021-05-03 14:10:13,221 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:10:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2021-05-03 14:10:13,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 1915. [2021-05-03 14:10:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.8876698014629048) internal successors, (5527), 1914 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:13,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5527 transitions. [2021-05-03 14:10:13,240 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5527 transitions. Word has length 21 [2021-05-03 14:10:13,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:13,241 INFO L480 AbstractCegarLoop]: Abstraction has 1915 states and 5527 transitions. [2021-05-03 14:10:13,241 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) [2021-05-03 14:10:13,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5527 transitions. [2021-05-03 14:10:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:13,242 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:13,242 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:13,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16308,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:13,443 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:13,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:13,443 INFO L82 PathProgramCache]: Analyzing trace with hash -402996913, now seen corresponding path program 380 times [2021-05-03 14:10:13,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:13,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441256424] [2021-05-03 14:10:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:13,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441256424] [2021-05-03 14:10:13,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188109108] [2021-05-03 14:10:13,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:13,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:13,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:13,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:13,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:13,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:13,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:10:13,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201615697] [2021-05-03 14:10:13,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:10:13,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:13,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:10:13,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:10:13,607 INFO L87 Difference]: Start difference. First operand 1915 states and 5527 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:13,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:13,842 INFO L93 Difference]: Finished difference Result 2204 states and 6118 transitions. [2021-05-03 14:10:13,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:10:13,843 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:13,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:13,846 INFO L225 Difference]: With dead ends: 2204 [2021-05-03 14:10:13,846 INFO L226 Difference]: Without dead ends: 2202 [2021-05-03 14:10:13,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:10:13,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-05-03 14:10:13,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1917. [2021-05-03 14:10:13,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1916 states have (on average 2.887787056367432) internal successors, (5533), 1916 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:13,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 5533 transitions. [2021-05-03 14:10:13,868 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 5533 transitions. Word has length 21 [2021-05-03 14:10:13,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:13,868 INFO L480 AbstractCegarLoop]: Abstraction has 1917 states and 5533 transitions. [2021-05-03 14:10:13,868 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) [2021-05-03 14:10:13,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 5533 transitions. [2021-05-03 14:10:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:13,870 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:13,870 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:14,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16309,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:14,070 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:14,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:14,070 INFO L82 PathProgramCache]: Analyzing trace with hash -909343179, now seen corresponding path program 381 times [2021-05-03 14:10:14,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:14,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648626994] [2021-05-03 14:10:14,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:14,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648626994] [2021-05-03 14:10:14,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891385965] [2021-05-03 14:10:14,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:14,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:10:14,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:14,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:14,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:14,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:14,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 14:10:14,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616100262] [2021-05-03 14:10:14,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:10:14,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:14,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:10:14,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:10:14,234 INFO L87 Difference]: Start difference. First operand 1917 states and 5533 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:14,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:14,468 INFO L93 Difference]: Finished difference Result 2248 states and 6327 transitions. [2021-05-03 14:10:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:10:14,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:14,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:14,471 INFO L225 Difference]: With dead ends: 2248 [2021-05-03 14:10:14,472 INFO L226 Difference]: Without dead ends: 2248 [2021-05-03 14:10:14,472 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:10:14,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-05-03 14:10:14,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2054. [2021-05-03 14:10:14,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 2.895762299074525) internal successors, (5945), 2053 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:14,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 5945 transitions. [2021-05-03 14:10:14,494 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 5945 transitions. Word has length 21 [2021-05-03 14:10:14,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:14,494 INFO L480 AbstractCegarLoop]: Abstraction has 2054 states and 5945 transitions. [2021-05-03 14:10:14,494 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) [2021-05-03 14:10:14,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 5945 transitions. [2021-05-03 14:10:14,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:14,496 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:14,496 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:14,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16310 [2021-05-03 14:10:14,696 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:14,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:14,697 INFO L82 PathProgramCache]: Analyzing trace with hash -471423792, now seen corresponding path program 382 times [2021-05-03 14:10:14,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:14,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124681379] [2021-05-03 14:10:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:14,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124681379] [2021-05-03 14:10:14,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253053738] [2021-05-03 14:10:14,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:14,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:14,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:14,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:14,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:14,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:14,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:10:14,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357491174] [2021-05-03 14:10:14,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:10:14,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:14,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:10:14,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:10:14,863 INFO L87 Difference]: Start difference. First operand 2054 states and 5945 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:15,052 INFO L93 Difference]: Finished difference Result 2927 states and 7947 transitions. [2021-05-03 14:10:15,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:10:15,053 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:15,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:15,056 INFO L225 Difference]: With dead ends: 2927 [2021-05-03 14:10:15,056 INFO L226 Difference]: Without dead ends: 2917 [2021-05-03 14:10:15,056 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:10:15,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-05-03 14:10:15,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2066. [2021-05-03 14:10:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 2.8949152542372882) internal successors, (5978), 2065 states have internal predecessors, (5978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:15,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 5978 transitions. [2021-05-03 14:10:15,079 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 5978 transitions. Word has length 21 [2021-05-03 14:10:15,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:15,079 INFO L480 AbstractCegarLoop]: Abstraction has 2066 states and 5978 transitions. [2021-05-03 14:10:15,079 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) [2021-05-03 14:10:15,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 5978 transitions. [2021-05-03 14:10:15,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:15,081 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:15,081 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:15,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16311 [2021-05-03 14:10:15,281 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:15,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:15,281 INFO L82 PathProgramCache]: Analyzing trace with hash 573791759, now seen corresponding path program 383 times [2021-05-03 14:10:15,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:15,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973269426] [2021-05-03 14:10:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:15,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973269426] [2021-05-03 14:10:15,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757798915] [2021-05-03 14:10:15,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:15,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:10:15,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:15,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:15,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:15,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:15,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:10:15,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796100120] [2021-05-03 14:10:15,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:10:15,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:15,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:10:15,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:10:15,464 INFO L87 Difference]: Start difference. First operand 2066 states and 5978 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:15,634 INFO L93 Difference]: Finished difference Result 2220 states and 6263 transitions. [2021-05-03 14:10:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:10:15,635 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:15,637 INFO L225 Difference]: With dead ends: 2220 [2021-05-03 14:10:15,637 INFO L226 Difference]: Without dead ends: 2214 [2021-05-03 14:10:15,637 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:10:15,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-05-03 14:10:15,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2055. [2021-05-03 14:10:15,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8938656280428434) internal successors, (5944), 2054 states have internal predecessors, (5944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:15,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5944 transitions. [2021-05-03 14:10:15,656 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5944 transitions. Word has length 21 [2021-05-03 14:10:15,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:15,656 INFO L480 AbstractCegarLoop]: Abstraction has 2055 states and 5944 transitions. [2021-05-03 14:10:15,656 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) [2021-05-03 14:10:15,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5944 transitions. [2021-05-03 14:10:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:15,658 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:15,658 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:15,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16312 [2021-05-03 14:10:15,858 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:15,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:15,858 INFO L82 PathProgramCache]: Analyzing trace with hash -693665419, now seen corresponding path program 384 times [2021-05-03 14:10:15,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:15,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282845870] [2021-05-03 14:10:15,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:15,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282845870] [2021-05-03 14:10:15,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449140469] [2021-05-03 14:10:15,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:15,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:10:15,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:15,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:15,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:16,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:16,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:10:16,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358991457] [2021-05-03 14:10:16,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:10:16,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:16,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:10:16,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:10:16,035 INFO L87 Difference]: Start difference. First operand 2055 states and 5944 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:16,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:16,202 INFO L93 Difference]: Finished difference Result 2405 states and 6839 transitions. [2021-05-03 14:10:16,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:10:16,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:16,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:16,206 INFO L225 Difference]: With dead ends: 2405 [2021-05-03 14:10:16,206 INFO L226 Difference]: Without dead ends: 2405 [2021-05-03 14:10:16,206 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:10:16,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-05-03 14:10:16,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2231. [2021-05-03 14:10:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2230 states have (on average 2.8937219730941703) internal successors, (6453), 2230 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 6453 transitions. [2021-05-03 14:10:16,229 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 6453 transitions. Word has length 21 [2021-05-03 14:10:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:16,230 INFO L480 AbstractCegarLoop]: Abstraction has 2231 states and 6453 transitions. [2021-05-03 14:10:16,230 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) [2021-05-03 14:10:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 6453 transitions. [2021-05-03 14:10:16,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:16,232 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:16,232 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:16,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16313 [2021-05-03 14:10:16,432 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:16,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:16,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1740706480, now seen corresponding path program 385 times [2021-05-03 14:10:16,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:16,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608536178] [2021-05-03 14:10:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:16,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608536178] [2021-05-03 14:10:16,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278262501] [2021-05-03 14:10:16,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:16,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:16,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:16,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:16,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:10:16,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391152287] [2021-05-03 14:10:16,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:16,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:16,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:16,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:16,614 INFO L87 Difference]: Start difference. First operand 2231 states and 6453 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:16,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:16,848 INFO L93 Difference]: Finished difference Result 3084 states and 8355 transitions. [2021-05-03 14:10:16,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:10:16,849 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:16,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:16,853 INFO L225 Difference]: With dead ends: 3084 [2021-05-03 14:10:16,853 INFO L226 Difference]: Without dead ends: 3070 [2021-05-03 14:10:16,853 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:10:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-05-03 14:10:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2241. [2021-05-03 14:10:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 2.8924107142857145) internal successors, (6479), 2240 states have internal predecessors, (6479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 6479 transitions. [2021-05-03 14:10:16,881 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 6479 transitions. Word has length 21 [2021-05-03 14:10:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:16,881 INFO L480 AbstractCegarLoop]: Abstraction has 2241 states and 6479 transitions. [2021-05-03 14:10:16,881 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) [2021-05-03 14:10:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 6479 transitions. [2021-05-03 14:10:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:16,883 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:16,883 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:17,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16314,390 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:17,084 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:17,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:17,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1330132273, now seen corresponding path program 386 times [2021-05-03 14:10:17,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:17,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410019566] [2021-05-03 14:10:17,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:17,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410019566] [2021-05-03 14:10:17,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828195244] [2021-05-03 14:10:17,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:17,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:17,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:17,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:17,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:17,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:17,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:10:17,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644686270] [2021-05-03 14:10:17,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:17,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:17,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:17,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:17,268 INFO L87 Difference]: Start difference. First operand 2241 states and 6479 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:17,532 INFO L93 Difference]: Finished difference Result 2484 states and 7025 transitions. [2021-05-03 14:10:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:10:17,534 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:17,537 INFO L225 Difference]: With dead ends: 2484 [2021-05-03 14:10:17,537 INFO L226 Difference]: Without dead ends: 2484 [2021-05-03 14:10:17,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:10:17,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-05-03 14:10:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2245. [2021-05-03 14:10:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 2.892602495543672) internal successors, (6491), 2244 states have internal predecessors, (6491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 6491 transitions. [2021-05-03 14:10:17,562 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 6491 transitions. Word has length 21 [2021-05-03 14:10:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:17,562 INFO L480 AbstractCegarLoop]: Abstraction has 2245 states and 6491 transitions. [2021-05-03 14:10:17,562 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) [2021-05-03 14:10:17,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 6491 transitions. [2021-05-03 14:10:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:17,564 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:17,564 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:17,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16315,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:17,764 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:17,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:17,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2009452908, now seen corresponding path program 387 times [2021-05-03 14:10:17,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:17,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644098422] [2021-05-03 14:10:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:17,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644098422] [2021-05-03 14:10:17,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152207871] [2021-05-03 14:10:17,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:17,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:10:17,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:17,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:17,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:17,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:17,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:10:17,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215869632] [2021-05-03 14:10:17,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:17,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:17,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:17,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:17,960 INFO L87 Difference]: Start difference. First operand 2245 states and 6491 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:18,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:18,067 INFO L93 Difference]: Finished difference Result 2777 states and 7639 transitions. [2021-05-03 14:10:18,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:10:18,068 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:18,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:18,071 INFO L225 Difference]: With dead ends: 2777 [2021-05-03 14:10:18,071 INFO L226 Difference]: Without dead ends: 2761 [2021-05-03 14:10:18,071 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:10:18,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-05-03 14:10:18,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2243. [2021-05-03 14:10:18,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 2.893398751115076) internal successors, (6487), 2242 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 6487 transitions. [2021-05-03 14:10:18,092 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 6487 transitions. Word has length 21 [2021-05-03 14:10:18,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:18,092 INFO L480 AbstractCegarLoop]: Abstraction has 2243 states and 6487 transitions. [2021-05-03 14:10:18,092 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) [2021-05-03 14:10:18,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 6487 transitions. [2021-05-03 14:10:18,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:10:18,094 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:18,094 INFO L551 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:18,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16316,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:18,294 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:18,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:18,295 INFO L82 PathProgramCache]: Analyzing trace with hash 414231733, now seen corresponding path program 388 times [2021-05-03 14:10:18,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:18,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385170090] [2021-05-03 14:10:18,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:18,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385170090] [2021-05-03 14:10:18,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726788462] [2021-05-03 14:10:18,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:18,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:18,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:18,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:10:18,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:18,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:18,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:10:18,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981006570] [2021-05-03 14:10:18,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:18,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:18,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:18,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:18,504 INFO L87 Difference]: Start difference. First operand 2243 states and 6487 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:18,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:18,894 INFO L93 Difference]: Finished difference Result 2725 states and 7700 transitions. [2021-05-03 14:10:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:10:18,895 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 14:10:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:18,898 INFO L225 Difference]: With dead ends: 2725 [2021-05-03 14:10:18,898 INFO L226 Difference]: Without dead ends: 2725 [2021-05-03 14:10:18,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=338, Invalid=654, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:10:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-05-03 14:10:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2301. [2021-05-03 14:10:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 2.893478260869565) internal successors, (6655), 2300 states have internal predecessors, (6655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:18,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 6655 transitions. [2021-05-03 14:10:18,923 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 6655 transitions. Word has length 21 [2021-05-03 14:10:18,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:18,923 INFO L480 AbstractCegarLoop]: Abstraction has 2301 states and 6655 transitions. [2021-05-03 14:10:18,923 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) [2021-05-03 14:10:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 6655 transitions. [2021-05-03 14:10:18,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:18,925 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:18,925 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:19,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16317,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:19,126 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:19,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:19,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1134083623, now seen corresponding path program 389 times [2021-05-03 14:10:19,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:19,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885418490] [2021-05-03 14:10:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:19,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885418490] [2021-05-03 14:10:19,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623589684] [2021-05-03 14:10:19,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:19,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:10:19,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:19,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:10:19,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:20,142 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:10:20,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:20,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:10:23,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:23,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:23,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:23,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:10:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:23,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:23,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 14:10:23,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348958436] [2021-05-03 14:10:23,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 14:10:23,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:23,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 14:10:23,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:10:23,848 INFO L87 Difference]: Start difference. First operand 2301 states and 6655 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:24,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:24,541 INFO L93 Difference]: Finished difference Result 2401 states and 6850 transitions. [2021-05-03 14:10:24,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:10:24,542 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:24,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:24,544 INFO L225 Difference]: With dead ends: 2401 [2021-05-03 14:10:24,545 INFO L226 Difference]: Without dead ends: 2362 [2021-05-03 14:10:24,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 968.1ms TimeCoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 14:10:24,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-05-03 14:10:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2321. [2021-05-03 14:10:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2320 states have (on average 2.8922413793103448) internal successors, (6710), 2320 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:24,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 6710 transitions. [2021-05-03 14:10:24,569 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 6710 transitions. Word has length 22 [2021-05-03 14:10:24,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:24,569 INFO L480 AbstractCegarLoop]: Abstraction has 2321 states and 6710 transitions. [2021-05-03 14:10:24,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 6710 transitions. [2021-05-03 14:10:24,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:24,571 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:24,571 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:24,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16318,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:24,772 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:24,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:24,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1610689749, now seen corresponding path program 390 times [2021-05-03 14:10:24,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:24,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821369197] [2021-05-03 14:10:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:24,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821369197] [2021-05-03 14:10:24,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969647087] [2021-05-03 14:10:24,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:24,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:10:24,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:24,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:10:24,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:25,627 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:10:25,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:25,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:10:26,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:26,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:26,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:26,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:10:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:26,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:26,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:10:26,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017177558] [2021-05-03 14:10:26,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:10:26,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:26,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:10:26,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:26,417 INFO L87 Difference]: Start difference. First operand 2321 states and 6710 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:26,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:26,997 INFO L93 Difference]: Finished difference Result 2430 states and 6936 transitions. [2021-05-03 14:10:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:10:26,998 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:26,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:27,001 INFO L225 Difference]: With dead ends: 2430 [2021-05-03 14:10:27,001 INFO L226 Difference]: Without dead ends: 2414 [2021-05-03 14:10:27,001 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 630.3ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:10:27,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-05-03 14:10:27,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2342. [2021-05-03 14:10:27,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 2.897052541648868) internal successors, (6782), 2341 states have internal predecessors, (6782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:27,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 6782 transitions. [2021-05-03 14:10:27,022 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 6782 transitions. Word has length 22 [2021-05-03 14:10:27,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:27,023 INFO L480 AbstractCegarLoop]: Abstraction has 2342 states and 6782 transitions. [2021-05-03 14:10:27,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:27,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 6782 transitions. [2021-05-03 14:10:27,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:27,024 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:27,024 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:27,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17475,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:27,225 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:27,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:27,225 INFO L82 PathProgramCache]: Analyzing trace with hash -751815219, now seen corresponding path program 391 times [2021-05-03 14:10:27,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:27,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188110407] [2021-05-03 14:10:27,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:27,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188110407] [2021-05-03 14:10:27,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427460010] [2021-05-03 14:10:27,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:27,422 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:10:27,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:28,088 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:10:28,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:28,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:10:28,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:29,012 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:10:29,013 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:10:29,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:10:30,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:10:30,417 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:10:30,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:30,418 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:10:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:30,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:30,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:10:30,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728658418] [2021-05-03 14:10:30,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:10:30,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:30,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:10:30,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:30,470 INFO L87 Difference]: Start difference. First operand 2342 states and 6782 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:31,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:31,252 INFO L93 Difference]: Finished difference Result 2452 states and 6986 transitions. [2021-05-03 14:10:31,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:10:31,253 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:31,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:31,256 INFO L225 Difference]: With dead ends: 2452 [2021-05-03 14:10:31,256 INFO L226 Difference]: Without dead ends: 2442 [2021-05-03 14:10:31,256 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 671.4ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:10:31,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-05-03 14:10:31,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2342. [2021-05-03 14:10:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 2.897052541648868) internal successors, (6782), 2341 states have internal predecessors, (6782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 6782 transitions. [2021-05-03 14:10:31,281 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 6782 transitions. Word has length 22 [2021-05-03 14:10:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:31,282 INFO L480 AbstractCegarLoop]: Abstraction has 2342 states and 6782 transitions. [2021-05-03 14:10:31,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:31,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 6782 transitions. [2021-05-03 14:10:31,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:31,284 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:31,284 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:31,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17730 [2021-05-03 14:10:31,484 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:31,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:31,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1241823813, now seen corresponding path program 392 times [2021-05-03 14:10:31,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:31,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735007418] [2021-05-03 14:10:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:31,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735007418] [2021-05-03 14:10:31,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492934106] [2021-05-03 14:10:31,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:31,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:31,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:31,692 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:10:31,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:32,357 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:10:32,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:32,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:10:33,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:33,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:33,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:33,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:10:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:33,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:33,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:10:33,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308208806] [2021-05-03 14:10:33,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:10:33,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:33,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:10:33,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:33,707 INFO L87 Difference]: Start difference. First operand 2342 states and 6782 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:34,612 INFO L93 Difference]: Finished difference Result 2475 states and 7097 transitions. [2021-05-03 14:10:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:10:34,613 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:34,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:34,616 INFO L225 Difference]: With dead ends: 2475 [2021-05-03 14:10:34,617 INFO L226 Difference]: Without dead ends: 2459 [2021-05-03 14:10:34,617 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 633.5ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:10:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-05-03 14:10:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2381. [2021-05-03 14:10:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.9063025210084033) internal successors, (6917), 2380 states have internal predecessors, (6917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:34,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6917 transitions. [2021-05-03 14:10:34,643 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6917 transitions. Word has length 22 [2021-05-03 14:10:34,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:34,643 INFO L480 AbstractCegarLoop]: Abstraction has 2381 states and 6917 transitions. [2021-05-03 14:10:34,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:34,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6917 transitions. [2021-05-03 14:10:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:34,645 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:34,645 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:34,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18332 [2021-05-03 14:10:34,845 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:34,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:34,846 INFO L82 PathProgramCache]: Analyzing trace with hash -382949283, now seen corresponding path program 393 times [2021-05-03 14:10:34,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:34,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625427461] [2021-05-03 14:10:34,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:35,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625427461] [2021-05-03 14:10:35,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250434453] [2021-05-03 14:10:35,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:35,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:10:35,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:35,038 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:10:35,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:35,686 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:10:35,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:35,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:10:36,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:36,776 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:10:36,777 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:10:36,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:10:37,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:10:38,010 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:10:38,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:38,011 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:10:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:38,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:38,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:10:38,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107913298] [2021-05-03 14:10:38,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:10:38,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:38,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:10:38,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:38,068 INFO L87 Difference]: Start difference. First operand 2381 states and 6917 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:38,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:38,761 INFO L93 Difference]: Finished difference Result 2516 states and 7177 transitions. [2021-05-03 14:10:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:10:38,762 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:38,765 INFO L225 Difference]: With dead ends: 2516 [2021-05-03 14:10:38,766 INFO L226 Difference]: Without dead ends: 2497 [2021-05-03 14:10:38,766 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 763.3ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:10:38,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-05-03 14:10:38,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2379. [2021-05-03 14:10:38,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 2.904541631623213) internal successors, (6907), 2378 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:38,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 6907 transitions. [2021-05-03 14:10:38,791 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 6907 transitions. Word has length 22 [2021-05-03 14:10:38,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:38,791 INFO L480 AbstractCegarLoop]: Abstraction has 2379 states and 6907 transitions. [2021-05-03 14:10:38,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:38,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 6907 transitions. [2021-05-03 14:10:38,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:38,793 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:38,793 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:38,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18824,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:38,994 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:38,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1327664025, now seen corresponding path program 394 times [2021-05-03 14:10:38,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:38,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32252097] [2021-05-03 14:10:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:39,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32252097] [2021-05-03 14:10:39,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982306722] [2021-05-03 14:10:39,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:39,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:39,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:39,195 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:10:39,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:39,829 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:10:39,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:39,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:10:40,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:40,645 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:10:40,646 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:10:40,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:10:41,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:10:41,511 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:10:41,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:41,512 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:10:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:41,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:41,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:10:41,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365293948] [2021-05-03 14:10:41,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:10:41,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:41,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:10:41,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:41,555 INFO L87 Difference]: Start difference. First operand 2379 states and 6907 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:42,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:42,476 INFO L93 Difference]: Finished difference Result 2452 states and 7057 transitions. [2021-05-03 14:10:42,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:10:42,477 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:42,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:42,480 INFO L225 Difference]: With dead ends: 2452 [2021-05-03 14:10:42,480 INFO L226 Difference]: Without dead ends: 2442 [2021-05-03 14:10:42,481 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 731.1ms TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:10:42,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-05-03 14:10:42,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2381. [2021-05-03 14:10:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.9046218487394957) internal successors, (6913), 2380 states have internal predecessors, (6913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:42,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6913 transitions. [2021-05-03 14:10:42,524 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6913 transitions. Word has length 22 [2021-05-03 14:10:42,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:42,524 INFO L480 AbstractCegarLoop]: Abstraction has 2381 states and 6913 transitions. [2021-05-03 14:10:42,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:42,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6913 transitions. [2021-05-03 14:10:42,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:42,526 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:42,526 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:42,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19351 [2021-05-03 14:10:42,726 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:42,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:42,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1415476527, now seen corresponding path program 395 times [2021-05-03 14:10:42,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:42,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671697966] [2021-05-03 14:10:42,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:10:42,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671697966] [2021-05-03 14:10:42,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540515413] [2021-05-03 14:10:42,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:42,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:10:42,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:42,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:10:42,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:43,602 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:10:43,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:43,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:10:44,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:44,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:44,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:44,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:10:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:44,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:44,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-05-03 14:10:44,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706747051] [2021-05-03 14:10:44,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:10:44,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:44,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:10:44,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:10:44,583 INFO L87 Difference]: Start difference. First operand 2381 states and 6913 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:45,077 INFO L93 Difference]: Finished difference Result 2422 states and 6975 transitions. [2021-05-03 14:10:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:10:45,078 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:45,081 INFO L225 Difference]: With dead ends: 2422 [2021-05-03 14:10:45,081 INFO L226 Difference]: Without dead ends: 2404 [2021-05-03 14:10:45,081 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 695.5ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:10:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-05-03 14:10:45,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2381. [2021-05-03 14:10:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.903781512605042) internal successors, (6911), 2380 states have internal predecessors, (6911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:45,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6911 transitions. [2021-05-03 14:10:45,103 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6911 transitions. Word has length 22 [2021-05-03 14:10:45,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:45,103 INFO L480 AbstractCegarLoop]: Abstraction has 2381 states and 6911 transitions. [2021-05-03 14:10:45,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6911 transitions. [2021-05-03 14:10:45,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:45,105 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:45,105 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:45,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19737,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:45,306 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:45,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:45,306 INFO L82 PathProgramCache]: Analyzing trace with hash -660249425, now seen corresponding path program 396 times [2021-05-03 14:10:45,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:45,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852166608] [2021-05-03 14:10:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:45,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852166608] [2021-05-03 14:10:45,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216525234] [2021-05-03 14:10:45,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:45,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:10:45,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:45,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:10:45,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:46,100 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:10:46,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:46,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:10:46,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:47,355 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:10:47,356 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:10:47,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:10:49,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:10:49,337 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:10:49,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:49,339 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:10:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:49,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:49,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:10:49,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212333303] [2021-05-03 14:10:49,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:10:49,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:49,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:10:49,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:49,399 INFO L87 Difference]: Start difference. First operand 2381 states and 6911 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:50,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:50,512 INFO L93 Difference]: Finished difference Result 2517 states and 7175 transitions. [2021-05-03 14:10:50,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:10:50,513 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:50,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:50,516 INFO L225 Difference]: With dead ends: 2517 [2021-05-03 14:10:50,516 INFO L226 Difference]: Without dead ends: 2507 [2021-05-03 14:10:50,516 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 750.1ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 14:10:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-05-03 14:10:50,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2380. [2021-05-03 14:10:50,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 2.903741067675494) internal successors, (6908), 2379 states have internal predecessors, (6908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 6908 transitions. [2021-05-03 14:10:50,541 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 6908 transitions. Word has length 22 [2021-05-03 14:10:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:50,541 INFO L480 AbstractCegarLoop]: Abstraction has 2380 states and 6908 transitions. [2021-05-03 14:10:50,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 6908 transitions. [2021-05-03 14:10:50,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:50,543 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:50,543 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:50,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20026 [2021-05-03 14:10:50,744 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:50,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:50,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1603085611, now seen corresponding path program 397 times [2021-05-03 14:10:50,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:50,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175917708] [2021-05-03 14:10:50,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:50,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175917708] [2021-05-03 14:10:50,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56645357] [2021-05-03 14:10:50,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:50,920 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:10:50,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:51,531 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:10:51,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:51,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:10:54,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:54,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:54,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:54,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:10:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:54,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:54,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:10:54,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094432865] [2021-05-03 14:10:54,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:10:54,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:54,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:10:54,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:54,319 INFO L87 Difference]: Start difference. First operand 2380 states and 6908 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:54,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:54,927 INFO L93 Difference]: Finished difference Result 2527 states and 7269 transitions. [2021-05-03 14:10:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:10:54,928 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:54,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:54,931 INFO L225 Difference]: With dead ends: 2527 [2021-05-03 14:10:54,931 INFO L226 Difference]: Without dead ends: 2509 [2021-05-03 14:10:54,931 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 600.0ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:10:54,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-05-03 14:10:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2429. [2021-05-03 14:10:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 2428 states have (on average 2.915156507413509) internal successors, (7078), 2428 states have internal predecessors, (7078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 7078 transitions. [2021-05-03 14:10:54,957 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 7078 transitions. Word has length 22 [2021-05-03 14:10:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:54,957 INFO L480 AbstractCegarLoop]: Abstraction has 2429 states and 7078 transitions. [2021-05-03 14:10:54,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 7078 transitions. [2021-05-03 14:10:54,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:54,959 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:54,959 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:55,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20714,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:55,160 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:55,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1833007155, now seen corresponding path program 398 times [2021-05-03 14:10:55,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:55,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644702078] [2021-05-03 14:10:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:55,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644702078] [2021-05-03 14:10:55,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663481667] [2021-05-03 14:10:55,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:55,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:55,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:55,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:10:55,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:55,973 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:10:55,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:55,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:10:56,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:57,415 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:10:57,416 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:10:57,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:10:58,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:10:58,053 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:10:58,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:10:58,054 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:10:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:58,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:58,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:10:58,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33787979] [2021-05-03 14:10:58,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:10:58,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:58,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:10:58,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:58,098 INFO L87 Difference]: Start difference. First operand 2429 states and 7078 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:59,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:59,182 INFO L93 Difference]: Finished difference Result 2609 states and 7439 transitions. [2021-05-03 14:10:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 14:10:59,183 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:59,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:59,187 INFO L225 Difference]: With dead ends: 2609 [2021-05-03 14:10:59,187 INFO L226 Difference]: Without dead ends: 2583 [2021-05-03 14:10:59,187 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 882.2ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 14:10:59,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-05-03 14:10:59,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2431. [2021-05-03 14:10:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2431 states, 2430 states have (on average 2.914814814814815) internal successors, (7083), 2430 states have internal predecessors, (7083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:59,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2431 states to 2431 states and 7083 transitions. [2021-05-03 14:10:59,211 INFO L78 Accepts]: Start accepts. Automaton has 2431 states and 7083 transitions. Word has length 22 [2021-05-03 14:10:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:59,211 INFO L480 AbstractCegarLoop]: Abstraction has 2431 states and 7083 transitions. [2021-05-03 14:10:59,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2431 states and 7083 transitions. [2021-05-03 14:10:59,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:59,213 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:59,213 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:59,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21574,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:59,414 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:59,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:59,414 INFO L82 PathProgramCache]: Analyzing trace with hash -122393847, now seen corresponding path program 399 times [2021-05-03 14:10:59,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:59,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306285505] [2021-05-03 14:10:59,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:59,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306285505] [2021-05-03 14:10:59,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709544006] [2021-05-03 14:10:59,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:59,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:10:59,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:59,599 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:10:59,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:00,178 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:00,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:00,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:11:02,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:02,712 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:11:02,713 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:11:02,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:11:05,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:11:05,763 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:11:05,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:11:05,764 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:11:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:05,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:05,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:11:05,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927204237] [2021-05-03 14:11:05,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:11:05,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:05,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:11:05,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:05,807 INFO L87 Difference]: Start difference. First operand 2431 states and 7083 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:07,166 INFO L93 Difference]: Finished difference Result 2675 states and 7586 transitions. [2021-05-03 14:11:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 14:11:07,167 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:07,170 INFO L225 Difference]: With dead ends: 2675 [2021-05-03 14:11:07,170 INFO L226 Difference]: Without dead ends: 2642 [2021-05-03 14:11:07,170 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 922.4ms TimeCoverageRelationStatistics Valid=197, Invalid=1525, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:11:07,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-05-03 14:11:07,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2423. [2021-05-03 14:11:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.911643270024773) internal successors, (7052), 2422 states have internal predecessors, (7052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 7052 transitions. [2021-05-03 14:11:07,193 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 7052 transitions. Word has length 22 [2021-05-03 14:11:07,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:07,193 INFO L480 AbstractCegarLoop]: Abstraction has 2423 states and 7052 transitions. [2021-05-03 14:11:07,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:07,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 7052 transitions. [2021-05-03 14:11:07,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:07,195 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:07,195 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:07,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22059 [2021-05-03 14:11:07,396 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:07,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:07,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1367011149, now seen corresponding path program 400 times [2021-05-03 14:11:07,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:07,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778201470] [2021-05-03 14:11:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:07,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778201470] [2021-05-03 14:11:07,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266179834] [2021-05-03 14:11:07,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:07,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:07,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:07,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:11:07,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:08,227 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:08,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:08,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:11:09,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:09,538 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:11:09,539 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:11:09,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:11:10,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:11:10,614 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:11:10,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:11:10,616 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:11:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:10,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:10,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:11:10,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483556918] [2021-05-03 14:11:10,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:11:10,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:10,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:11:10,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:10,672 INFO L87 Difference]: Start difference. First operand 2423 states and 7052 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:11,649 INFO L93 Difference]: Finished difference Result 2564 states and 7348 transitions. [2021-05-03 14:11:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:11:11,650 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:11,653 INFO L225 Difference]: With dead ends: 2564 [2021-05-03 14:11:11,653 INFO L226 Difference]: Without dead ends: 2554 [2021-05-03 14:11:11,653 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 892.2ms TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 14:11:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-05-03 14:11:11,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2425. [2021-05-03 14:11:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.9117161716171616) internal successors, (7058), 2424 states have internal predecessors, (7058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7058 transitions. [2021-05-03 14:11:11,680 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7058 transitions. Word has length 22 [2021-05-03 14:11:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:11,680 INFO L480 AbstractCegarLoop]: Abstraction has 2425 states and 7058 transitions. [2021-05-03 14:11:11,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:11,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7058 transitions. [2021-05-03 14:11:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:11,682 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:11,682 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:11,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23375,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:11,883 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:11,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:11,883 INFO L82 PathProgramCache]: Analyzing trace with hash -80298279, now seen corresponding path program 401 times [2021-05-03 14:11:11,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:11,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855924605] [2021-05-03 14:11:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:11:12,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855924605] [2021-05-03 14:11:12,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041988298] [2021-05-03 14:11:12,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:12,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:11:12,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:12,080 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:11:12,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:12,725 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:12,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:12,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:11:13,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:13,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:13,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:11:13,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:11:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:13,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:13,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-05-03 14:11:13,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324474636] [2021-05-03 14:11:13,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:11:13,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:13,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:11:13,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:11:13,597 INFO L87 Difference]: Start difference. First operand 2425 states and 7058 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:14,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:14,236 INFO L93 Difference]: Finished difference Result 2464 states and 7117 transitions. [2021-05-03 14:11:14,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:11:14,237 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:14,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:14,240 INFO L225 Difference]: With dead ends: 2464 [2021-05-03 14:11:14,240 INFO L226 Difference]: Without dead ends: 2446 [2021-05-03 14:11:14,240 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 681.2ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:11:14,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-05-03 14:11:14,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2425. [2021-05-03 14:11:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.911303630363036) internal successors, (7057), 2424 states have internal predecessors, (7057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7057 transitions. [2021-05-03 14:11:14,265 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7057 transitions. Word has length 22 [2021-05-03 14:11:14,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:14,265 INFO L480 AbstractCegarLoop]: Abstraction has 2425 states and 7057 transitions. [2021-05-03 14:11:14,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:14,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7057 transitions. [2021-05-03 14:11:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:14,267 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:14,267 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:14,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23955 [2021-05-03 14:11:14,468 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:14,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:14,468 INFO L82 PathProgramCache]: Analyzing trace with hash -128763657, now seen corresponding path program 402 times [2021-05-03 14:11:14,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:14,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064110200] [2021-05-03 14:11:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:14,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064110200] [2021-05-03 14:11:14,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897609300] [2021-05-03 14:11:14,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:14,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:11:14,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:14,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:11:14,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:15,355 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:15,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:15,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:11:17,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:17,945 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:11:17,945 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:11:17,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:11:19,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:11:19,309 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:11:19,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:11:19,311 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:11:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:19,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:19,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:11:19,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847048842] [2021-05-03 14:11:19,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:11:19,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:19,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:11:19,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:19,369 INFO L87 Difference]: Start difference. First operand 2425 states and 7057 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:20,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:20,300 INFO L93 Difference]: Finished difference Result 2669 states and 7612 transitions. [2021-05-03 14:11:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 14:11:20,301 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:20,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:20,305 INFO L225 Difference]: With dead ends: 2669 [2021-05-03 14:11:20,305 INFO L226 Difference]: Without dead ends: 2659 [2021-05-03 14:11:20,305 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1048.4ms TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:11:20,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-05-03 14:11:20,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2426. [2021-05-03 14:11:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 2425 states have (on average 2.9117525773195876) internal successors, (7061), 2425 states have internal predecessors, (7061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 7061 transitions. [2021-05-03 14:11:20,334 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 7061 transitions. Word has length 22 [2021-05-03 14:11:20,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:20,334 INFO L480 AbstractCegarLoop]: Abstraction has 2426 states and 7061 transitions. [2021-05-03 14:11:20,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:20,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 7061 transitions. [2021-05-03 14:11:20,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:20,336 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:20,337 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:20,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24215 [2021-05-03 14:11:20,537 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:20,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:20,537 INFO L82 PathProgramCache]: Analyzing trace with hash -399035461, now seen corresponding path program 403 times [2021-05-03 14:11:20,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:20,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491360077] [2021-05-03 14:11:20,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:20,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491360077] [2021-05-03 14:11:20,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402279469] [2021-05-03 14:11:20,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:20,725 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:11:20,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:21,462 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:21,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:21,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:11:22,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:22,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:22,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:11:22,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:11:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:22,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:22,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:11:22,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374854317] [2021-05-03 14:11:22,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:11:22,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:22,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:11:22,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:11:22,243 INFO L87 Difference]: Start difference. First operand 2426 states and 7061 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:23,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:23,336 INFO L93 Difference]: Finished difference Result 2557 states and 7399 transitions. [2021-05-03 14:11:23,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:11:23,337 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:23,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:23,340 INFO L225 Difference]: With dead ends: 2557 [2021-05-03 14:11:23,340 INFO L226 Difference]: Without dead ends: 2541 [2021-05-03 14:11:23,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 690.5ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:11:23,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-05-03 14:11:23,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2477. [2021-05-03 14:11:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 2.9232633279483036) internal successors, (7238), 2476 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:23,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 7238 transitions. [2021-05-03 14:11:23,370 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 7238 transitions. Word has length 22 [2021-05-03 14:11:23,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:23,370 INFO L480 AbstractCegarLoop]: Abstraction has 2477 states and 7238 transitions. [2021-05-03 14:11:23,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 7238 transitions. [2021-05-03 14:11:23,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:23,373 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:23,373 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:23,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25242,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:23,574 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:23,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:23,574 INFO L82 PathProgramCache]: Analyzing trace with hash 459839069, now seen corresponding path program 404 times [2021-05-03 14:11:23,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:23,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060531865] [2021-05-03 14:11:23,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:23,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060531865] [2021-05-03 14:11:23,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794802955] [2021-05-03 14:11:23,774 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 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:23,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:23,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:23,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:11:23,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:24,506 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:24,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:24,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:11:25,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:26,188 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:11:26,189 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:11:26,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:11:26,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:11:27,012 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:11:27,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:11:27,013 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:11:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:27,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:27,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:11:27,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395664862] [2021-05-03 14:11:27,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:11:27,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:27,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:11:27,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:11:27,054 INFO L87 Difference]: Start difference. First operand 2477 states and 7238 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:28,796 INFO L93 Difference]: Finished difference Result 2676 states and 7671 transitions. [2021-05-03 14:11:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 14:11:28,797 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:28,801 INFO L225 Difference]: With dead ends: 2676 [2021-05-03 14:11:28,801 INFO L226 Difference]: Without dead ends: 2650 [2021-05-03 14:11:28,801 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1084.3ms TimeCoverageRelationStatistics Valid=206, Invalid=1686, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 14:11:28,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-05-03 14:11:28,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2483. [2021-05-03 14:11:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.9234488315874296) internal successors, (7256), 2482 states have internal predecessors, (7256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 7256 transitions. [2021-05-03 14:11:28,828 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 7256 transitions. Word has length 22 [2021-05-03 14:11:28,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:28,828 INFO L480 AbstractCegarLoop]: Abstraction has 2483 states and 7256 transitions. [2021-05-03 14:11:28,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:28,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 7256 transitions. [2021-05-03 14:11:28,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:28,830 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:28,830 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:29,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25480,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:29,033 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:29,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:29,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2124514919, now seen corresponding path program 405 times [2021-05-03 14:11:29,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:29,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167006164] [2021-05-03 14:11:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:29,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167006164] [2021-05-03 14:11:29,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152060120] [2021-05-03 14:11:29,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:29,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:11:29,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:29,247 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:11:29,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:29,910 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:29,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:29,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:11:31,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:31,774 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:11:31,774 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:11:31,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:11:34,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:11:34,603 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:11:34,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:11:34,603 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:11:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:34,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:34,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:11:34,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702353914] [2021-05-03 14:11:34,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:11:34,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:34,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:11:34,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:11:34,645 INFO L87 Difference]: Start difference. First operand 2483 states and 7256 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:35,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:35,721 INFO L93 Difference]: Finished difference Result 2619 states and 7552 transitions. [2021-05-03 14:11:35,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 14:11:35,721 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:35,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:35,725 INFO L225 Difference]: With dead ends: 2619 [2021-05-03 14:11:35,725 INFO L226 Difference]: Without dead ends: 2609 [2021-05-03 14:11:35,725 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 923.1ms TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 14:11:35,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-05-03 14:11:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 2498. [2021-05-03 14:11:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2497 states have (on average 2.924309171005206) internal successors, (7302), 2497 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 7302 transitions. [2021-05-03 14:11:35,751 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 7302 transitions. Word has length 22 [2021-05-03 14:11:35,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:35,751 INFO L480 AbstractCegarLoop]: Abstraction has 2498 states and 7302 transitions. [2021-05-03 14:11:35,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:35,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 7302 transitions. [2021-05-03 14:11:35,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:35,753 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:35,753 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:35,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26088 [2021-05-03 14:11:35,954 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:35,954 INFO L82 PathProgramCache]: Analyzing trace with hash -635109923, now seen corresponding path program 406 times [2021-05-03 14:11:35,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:35,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016864858] [2021-05-03 14:11:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:36,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016864858] [2021-05-03 14:11:36,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970950965] [2021-05-03 14:11:36,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:36,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:36,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:36,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:11:36,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:36,845 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:36,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:36,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:11:37,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:37,712 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:11:37,712 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:11:37,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:11:38,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:11:38,376 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:11:38,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:11:38,378 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:11:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:38,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:38,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:11:38,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076435495] [2021-05-03 14:11:38,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:11:38,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:38,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:11:38,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:38,437 INFO L87 Difference]: Start difference. First operand 2498 states and 7302 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:39,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:39,754 INFO L93 Difference]: Finished difference Result 2729 states and 7824 transitions. [2021-05-03 14:11:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 14:11:39,755 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:39,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:39,758 INFO L225 Difference]: With dead ends: 2729 [2021-05-03 14:11:39,758 INFO L226 Difference]: Without dead ends: 2700 [2021-05-03 14:11:39,759 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1135.3ms TimeCoverageRelationStatistics Valid=229, Invalid=1841, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 14:11:39,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2021-05-03 14:11:39,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 2493. [2021-05-03 14:11:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2492 states have (on average 2.923354735152488) internal successors, (7285), 2492 states have internal predecessors, (7285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 7285 transitions. [2021-05-03 14:11:39,783 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 7285 transitions. Word has length 22 [2021-05-03 14:11:39,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:39,783 INFO L480 AbstractCegarLoop]: Abstraction has 2493 states and 7285 transitions. [2021-05-03 14:11:39,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:39,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 7285 transitions. [2021-05-03 14:11:39,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:39,785 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:39,785 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:39,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27310,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:39,985 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:39,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:39,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1708195303, now seen corresponding path program 407 times [2021-05-03 14:11:39,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:39,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071456341] [2021-05-03 14:11:39,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:40,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071456341] [2021-05-03 14:11:40,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703648521] [2021-05-03 14:11:40,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:40,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:11:40,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:40,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:11:40,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:40,857 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:40,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:40,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:11:41,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:42,103 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:11:42,103 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:11:42,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:11:45,190 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 1751 DAG size of output: 1209 [2021-05-03 14:11:45,312 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1751 DAG size of output: 1209 [2021-05-03 14:11:45,440 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1757 DAG size of output: 1215 [2021-05-03 14:11:45,549 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1217 DAG size of output: 1136 [2021-05-03 14:11:46,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:11:46,308 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:11:46,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:11:46,309 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:11:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:46,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:46,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:11:46,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889562541] [2021-05-03 14:11:46,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:11:46,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:46,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:11:46,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:46,370 INFO L87 Difference]: Start difference. First operand 2493 states and 7285 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:47,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:47,321 INFO L93 Difference]: Finished difference Result 2656 states and 7653 transitions. [2021-05-03 14:11:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:11:47,322 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:47,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:47,325 INFO L225 Difference]: With dead ends: 2656 [2021-05-03 14:11:47,325 INFO L226 Difference]: Without dead ends: 2646 [2021-05-03 14:11:47,325 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1067.0ms TimeCoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:11:47,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-05-03 14:11:47,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2494. [2021-05-03 14:11:47,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2493 states have (on average 2.923385479342158) internal successors, (7288), 2493 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 7288 transitions. [2021-05-03 14:11:47,348 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 7288 transitions. Word has length 22 [2021-05-03 14:11:47,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:47,348 INFO L480 AbstractCegarLoop]: Abstraction has 2494 states and 7288 transitions. [2021-05-03 14:11:47,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:47,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 7288 transitions. [2021-05-03 14:11:47,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:47,350 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:47,350 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:47,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27674 [2021-05-03 14:11:47,551 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:47,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:47,551 INFO L82 PathProgramCache]: Analyzing trace with hash 18563529, now seen corresponding path program 408 times [2021-05-03 14:11:47,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:47,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596147726] [2021-05-03 14:11:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:47,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596147726] [2021-05-03 14:11:47,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647819447] [2021-05-03 14:11:47,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:47,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:11:47,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:47,778 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:11:47,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:48,472 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:48,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:48,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:11:49,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:49,605 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:11:49,606 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:11:49,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:11:50,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:11:50,640 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:11:50,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:11:50,641 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:11:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:50,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:50,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:11:50,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664355839] [2021-05-03 14:11:50,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:11:50,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:50,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:11:50,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:11:50,683 INFO L87 Difference]: Start difference. First operand 2494 states and 7288 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:52,172 INFO L93 Difference]: Finished difference Result 2719 states and 7749 transitions. [2021-05-03 14:11:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 14:11:52,174 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:52,177 INFO L225 Difference]: With dead ends: 2719 [2021-05-03 14:11:52,177 INFO L226 Difference]: Without dead ends: 2697 [2021-05-03 14:11:52,177 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1015.0ms TimeCoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 14:11:52,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2021-05-03 14:11:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2493. [2021-05-03 14:11:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2492 states have (on average 2.92215088282504) internal successors, (7282), 2492 states have internal predecessors, (7282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:52,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 7282 transitions. [2021-05-03 14:11:52,207 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 7282 transitions. Word has length 22 [2021-05-03 14:11:52,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:52,207 INFO L480 AbstractCegarLoop]: Abstraction has 2493 states and 7282 transitions. [2021-05-03 14:11:52,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:52,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 7282 transitions. [2021-05-03 14:11:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:52,210 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:52,210 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:52,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29015,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:52,410 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:52,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:52,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1507968525, now seen corresponding path program 409 times [2021-05-03 14:11:52,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:52,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110720673] [2021-05-03 14:11:52,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:52,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110720673] [2021-05-03 14:11:52,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600446967] [2021-05-03 14:11:52,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:52,580 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:11:52,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:53,312 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:53,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:53,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:11:55,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:55,899 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:11:55,900 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:11:55,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:11:56,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:11:56,851 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:11:56,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:11:56,852 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:11:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:56,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:56,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:11:56,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150586218] [2021-05-03 14:11:56,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:11:56,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:56,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:11:56,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:56,896 INFO L87 Difference]: Start difference. First operand 2493 states and 7282 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:58,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:58,443 INFO L93 Difference]: Finished difference Result 2781 states and 7913 transitions. [2021-05-03 14:11:58,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 14:11:58,444 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:58,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:58,447 INFO L225 Difference]: With dead ends: 2781 [2021-05-03 14:11:58,447 INFO L226 Difference]: Without dead ends: 2752 [2021-05-03 14:11:58,447 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1240.5ms TimeCoverageRelationStatistics Valid=248, Invalid=1914, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 14:11:58,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-05-03 14:11:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2480. [2021-05-03 14:11:58,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2479 states have (on average 2.919322307382009) internal successors, (7237), 2479 states have internal predecessors, (7237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 7237 transitions. [2021-05-03 14:11:58,470 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 7237 transitions. Word has length 22 [2021-05-03 14:11:58,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:58,470 INFO L480 AbstractCegarLoop]: Abstraction has 2480 states and 7237 transitions. [2021-05-03 14:11:58,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:58,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 7237 transitions. [2021-05-03 14:11:58,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:58,472 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:58,472 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:58,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29525 [2021-05-03 14:11:58,673 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:58,673 INFO L82 PathProgramCache]: Analyzing trace with hash 434883145, now seen corresponding path program 410 times [2021-05-03 14:11:58,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:58,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629284197] [2021-05-03 14:11:58,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:58,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629284197] [2021-05-03 14:11:58,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986986652] [2021-05-03 14:11:58,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:58,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:58,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:58,913 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:11:58,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:59,580 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:11:59,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:59,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:12:02,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:12:02,937 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:12:02,937 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:12:02,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:12:03,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:03,445 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:12:03,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:12:03,446 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:12:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:03,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:03,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:12:03,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053308880] [2021-05-03 14:12:03,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:12:03,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:03,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:12:03,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:12:03,495 INFO L87 Difference]: Start difference. First operand 2480 states and 7237 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:04,639 INFO L93 Difference]: Finished difference Result 2723 states and 7787 transitions. [2021-05-03 14:12:04,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:12:04,640 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:04,644 INFO L225 Difference]: With dead ends: 2723 [2021-05-03 14:12:04,644 INFO L226 Difference]: Without dead ends: 2713 [2021-05-03 14:12:04,644 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1070.1ms TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:12:04,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-05-03 14:12:04,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2482. [2021-05-03 14:12:04,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2481 states have (on average 2.9185812172511083) internal successors, (7241), 2481 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:04,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 7241 transitions. [2021-05-03 14:12:04,670 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 7241 transitions. Word has length 22 [2021-05-03 14:12:04,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:04,670 INFO L480 AbstractCegarLoop]: Abstraction has 2482 states and 7241 transitions. [2021-05-03 14:12:04,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:04,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 7241 transitions. [2021-05-03 14:12:04,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:04,673 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:04,673 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:04,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30299 [2021-05-03 14:12:04,873 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:04,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:04,874 INFO L82 PathProgramCache]: Analyzing trace with hash -832574033, now seen corresponding path program 411 times [2021-05-03 14:12:04,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:04,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396812914] [2021-05-03 14:12:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:05,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396812914] [2021-05-03 14:12:05,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229756789] [2021-05-03 14:12:05,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:05,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:12:05,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:05,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:12:05,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:05,804 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:12:05,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:05,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:12:06,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:12:07,304 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:12:07,304 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:12:07,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:12:09,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:09,922 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:12:09,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:12:09,923 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:12:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:09,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:09,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:12:09,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019060225] [2021-05-03 14:12:09,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:12:09,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:09,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:12:09,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:12:09,990 INFO L87 Difference]: Start difference. First operand 2482 states and 7241 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:11,621 INFO L93 Difference]: Finished difference Result 2895 states and 8241 transitions. [2021-05-03 14:12:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 14:12:11,622 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:11,625 INFO L225 Difference]: With dead ends: 2895 [2021-05-03 14:12:11,625 INFO L226 Difference]: Without dead ends: 2885 [2021-05-03 14:12:11,625 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1345.5ms TimeCoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 14:12:11,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-05-03 14:12:11,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2483. [2021-05-03 14:12:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.91941982272361) internal successors, (7246), 2482 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 7246 transitions. [2021-05-03 14:12:11,649 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 7246 transitions. Word has length 22 [2021-05-03 14:12:11,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:11,649 INFO L480 AbstractCegarLoop]: Abstraction has 2483 states and 7246 transitions. [2021-05-03 14:12:11,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:11,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 7246 transitions. [2021-05-03 14:12:11,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:11,651 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:11,651 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:11,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31248 [2021-05-03 14:12:11,851 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:11,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1959720747, now seen corresponding path program 412 times [2021-05-03 14:12:11,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:11,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340959552] [2021-05-03 14:12:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:12,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340959552] [2021-05-03 14:12:12,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145978064] [2021-05-03 14:12:12,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:12,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:12:12,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:12,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:12:12,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:12,794 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:12:12,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:12,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:12:14,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:12:14,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:14,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:12:14,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:12:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:14,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:14,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:12:14,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852557551] [2021-05-03 14:12:14,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:12:14,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:14,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:12:14,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:12:14,782 INFO L87 Difference]: Start difference. First operand 2483 states and 7246 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:15,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:15,796 INFO L93 Difference]: Finished difference Result 2645 states and 7685 transitions. [2021-05-03 14:12:15,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:12:15,798 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:15,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:15,801 INFO L225 Difference]: With dead ends: 2645 [2021-05-03 14:12:15,801 INFO L226 Difference]: Without dead ends: 2627 [2021-05-03 14:12:15,801 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 694.1ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:12:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-05-03 14:12:15,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2561. [2021-05-03 14:12:15,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 2.933984375) internal successors, (7511), 2560 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:15,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 7511 transitions. [2021-05-03 14:12:15,832 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 7511 transitions. Word has length 22 [2021-05-03 14:12:15,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:15,832 INFO L480 AbstractCegarLoop]: Abstraction has 2561 states and 7511 transitions. [2021-05-03 14:12:15,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:15,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 7511 transitions. [2021-05-03 14:12:15,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:15,834 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:15,834 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:16,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32172,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:16,035 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:16,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:16,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1476372019, now seen corresponding path program 413 times [2021-05-03 14:12:16,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:16,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097080011] [2021-05-03 14:12:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:12:16,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097080011] [2021-05-03 14:12:16,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086277538] [2021-05-03 14:12:16,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:16,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:12:16,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:16,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:12:16,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:16,918 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:12:16,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:16,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:12:17,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:12:18,259 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:12:18,260 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:12:18,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:12:19,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:19,447 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:12:19,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:12:19,448 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:12:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:19,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:19,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:12:19,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383771593] [2021-05-03 14:12:19,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:12:19,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:19,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:12:19,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:12:19,514 INFO L87 Difference]: Start difference. First operand 2561 states and 7511 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:21,763 INFO L93 Difference]: Finished difference Result 2850 states and 8157 transitions. [2021-05-03 14:12:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 14:12:21,765 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:21,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:21,768 INFO L225 Difference]: With dead ends: 2850 [2021-05-03 14:12:21,768 INFO L226 Difference]: Without dead ends: 2817 [2021-05-03 14:12:21,768 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1426.3ms TimeCoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 14:12:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-05-03 14:12:21,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2572. [2021-05-03 14:12:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2572 states, 2571 states have (on average 2.9362115908206925) internal successors, (7549), 2571 states have internal predecessors, (7549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:21,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 7549 transitions. [2021-05-03 14:12:21,816 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 7549 transitions. Word has length 22 [2021-05-03 14:12:21,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:21,816 INFO L480 AbstractCegarLoop]: Abstraction has 2572 states and 7549 transitions. [2021-05-03 14:12:21,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:21,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 7549 transitions. [2021-05-03 14:12:21,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:21,818 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:21,818 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:22,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32842,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:22,019 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:22,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:22,020 INFO L82 PathProgramCache]: Analyzing trace with hash 234241289, now seen corresponding path program 414 times [2021-05-03 14:12:22,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:22,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485488678] [2021-05-03 14:12:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:22,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485488678] [2021-05-03 14:12:22,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860096941] [2021-05-03 14:12:22,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:22,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:12:22,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:22,249 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:12:22,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:22,931 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:12:22,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:22,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:12:23,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:12:24,119 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:12:24,120 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:12:24,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:12:24,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:24,773 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:12:24,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:12:24,775 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:12:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:24,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:24,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:12:24,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714950254] [2021-05-03 14:12:24,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:12:24,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:24,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:12:24,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:12:24,844 INFO L87 Difference]: Start difference. First operand 2572 states and 7549 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:27,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:27,464 INFO L93 Difference]: Finished difference Result 3018 states and 8552 transitions. [2021-05-03 14:12:27,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 14:12:27,465 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:27,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:27,468 INFO L225 Difference]: With dead ends: 3018 [2021-05-03 14:12:27,468 INFO L226 Difference]: Without dead ends: 2971 [2021-05-03 14:12:27,468 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 1585.5ms TimeCoverageRelationStatistics Valid=359, Invalid=2721, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 14:12:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2971 states. [2021-05-03 14:12:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2971 to 2579. [2021-05-03 14:12:27,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 2578 states have (on average 2.933281613653995) internal successors, (7562), 2578 states have internal predecessors, (7562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 7562 transitions. [2021-05-03 14:12:27,494 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 7562 transitions. Word has length 22 [2021-05-03 14:12:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:27,494 INFO L480 AbstractCegarLoop]: Abstraction has 2579 states and 7562 transitions. [2021-05-03 14:12:27,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:27,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 7562 transitions. [2021-05-03 14:12:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:27,496 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:27,496 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:27,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33450 [2021-05-03 14:12:27,696 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:27,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:27,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1723646285, now seen corresponding path program 415 times [2021-05-03 14:12:27,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:27,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415538859] [2021-05-03 14:12:27,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:12:27,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415538859] [2021-05-03 14:12:27,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089439933] [2021-05-03 14:12:27,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:27,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:12:27,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:28,712 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:12:28,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:28,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:12:29,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:12:29,771 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:12:29,771 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:12:29,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:12:30,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:30,421 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:12:30,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:12:30,422 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:12:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:30,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:30,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:12:30,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659543152] [2021-05-03 14:12:30,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:12:30,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:30,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:12:30,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:12:30,490 INFO L87 Difference]: Start difference. First operand 2579 states and 7562 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:32,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:32,103 INFO L93 Difference]: Finished difference Result 2793 states and 8044 transitions. [2021-05-03 14:12:32,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 14:12:32,104 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:32,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:32,108 INFO L225 Difference]: With dead ends: 2793 [2021-05-03 14:12:32,108 INFO L226 Difference]: Without dead ends: 2778 [2021-05-03 14:12:32,108 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1299.6ms TimeCoverageRelationStatistics Valid=243, Invalid=2013, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 14:12:32,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-05-03 14:12:32,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2592. [2021-05-03 14:12:32,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.932458510227711) internal successors, (7598), 2591 states have internal predecessors, (7598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 7598 transitions. [2021-05-03 14:12:32,138 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 7598 transitions. Word has length 22 [2021-05-03 14:12:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:32,138 INFO L480 AbstractCegarLoop]: Abstraction has 2592 states and 7598 transitions. [2021-05-03 14:12:32,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:32,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 7598 transitions. [2021-05-03 14:12:32,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:32,141 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:32,141 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:32,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33830 [2021-05-03 14:12:32,342 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:32,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:32,342 INFO L82 PathProgramCache]: Analyzing trace with hash 650560905, now seen corresponding path program 416 times [2021-05-03 14:12:32,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:32,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977138547] [2021-05-03 14:12:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:32,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977138547] [2021-05-03 14:12:32,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395453517] [2021-05-03 14:12:32,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:32,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:12:32,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:32,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:12:32,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:33,409 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:12:33,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:33,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:12:35,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:12:35,663 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:12:35,664 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:12:35,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:12:36,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:36,567 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:12:36,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:12:36,568 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:12:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:36,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:36,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:12:36,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907997776] [2021-05-03 14:12:36,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:12:36,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:36,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:12:36,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:12:36,638 INFO L87 Difference]: Start difference. First operand 2592 states and 7598 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:38,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:38,007 INFO L93 Difference]: Finished difference Result 2874 states and 8265 transitions. [2021-05-03 14:12:38,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 14:12:38,007 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:38,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:38,011 INFO L225 Difference]: With dead ends: 2874 [2021-05-03 14:12:38,011 INFO L226 Difference]: Without dead ends: 2852 [2021-05-03 14:12:38,011 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1506.6ms TimeCoverageRelationStatistics Valid=269, Invalid=2083, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 14:12:38,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-05-03 14:12:38,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2592. [2021-05-03 14:12:38,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.934002315708221) internal successors, (7602), 2591 states have internal predecessors, (7602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 7602 transitions. [2021-05-03 14:12:38,039 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 7602 transitions. Word has length 22 [2021-05-03 14:12:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:38,039 INFO L480 AbstractCegarLoop]: Abstraction has 2592 states and 7602 transitions. [2021-05-03 14:12:38,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 7602 transitions. [2021-05-03 14:12:38,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:38,042 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:38,042 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:38,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34200 [2021-05-03 14:12:38,242 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:38,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:38,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1744652493, now seen corresponding path program 417 times [2021-05-03 14:12:38,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:38,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837296157] [2021-05-03 14:12:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:38,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837296157] [2021-05-03 14:12:38,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595813087] [2021-05-03 14:12:38,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:38,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:12:38,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:38,530 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:12:38,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:39,242 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:12:39,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:39,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:12:40,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:12:40,638 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:12:40,639 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:12:40,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:12:42,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:42,087 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:12:42,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:12:42,089 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:12:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:42,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:42,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:12:42,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761786890] [2021-05-03 14:12:42,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:12:42,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:42,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:12:42,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:12:42,156 INFO L87 Difference]: Start difference. First operand 2592 states and 7602 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:43,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:43,335 INFO L93 Difference]: Finished difference Result 2811 states and 8117 transitions. [2021-05-03 14:12:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 14:12:43,336 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:43,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:43,340 INFO L225 Difference]: With dead ends: 2811 [2021-05-03 14:12:43,340 INFO L226 Difference]: Without dead ends: 2801 [2021-05-03 14:12:43,340 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1373.2ms TimeCoverageRelationStatistics Valid=236, Invalid=1834, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 14:12:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-05-03 14:12:43,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2592. [2021-05-03 14:12:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.934002315708221) internal successors, (7602), 2591 states have internal predecessors, (7602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 7602 transitions. [2021-05-03 14:12:43,372 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 7602 transitions. Word has length 22 [2021-05-03 14:12:43,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:43,372 INFO L480 AbstractCegarLoop]: Abstraction has 2592 states and 7602 transitions. [2021-05-03 14:12:43,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 7602 transitions. [2021-05-03 14:12:43,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:43,375 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:43,375 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:43,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34959,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:43,575 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:43,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:43,576 INFO L82 PathProgramCache]: Analyzing trace with hash -560398563, now seen corresponding path program 418 times [2021-05-03 14:12:43,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:43,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767543298] [2021-05-03 14:12:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:12:43,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767543298] [2021-05-03 14:12:43,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593334126] [2021-05-03 14:12:43,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:43,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:12:43,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:43,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:12:43,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:44,611 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:12:44,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:44,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:12:46,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:12:47,376 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:12:47,376 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:12:47,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:12:49,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:49,344 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:12:49,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:12:49,345 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:12:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:49,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:49,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:12:49,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277302746] [2021-05-03 14:12:49,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:12:49,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:49,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:12:49,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:12:49,403 INFO L87 Difference]: Start difference. First operand 2592 states and 7602 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:51,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:51,297 INFO L93 Difference]: Finished difference Result 3052 states and 8624 transitions. [2021-05-03 14:12:51,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 14:12:51,298 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:51,302 INFO L225 Difference]: With dead ends: 3052 [2021-05-03 14:12:51,302 INFO L226 Difference]: Without dead ends: 3011 [2021-05-03 14:12:51,303 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1640.3ms TimeCoverageRelationStatistics Valid=348, Invalid=2732, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 14:12:51,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2021-05-03 14:12:51,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 2594. [2021-05-03 14:12:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 2.9298110296953337) internal successors, (7597), 2593 states have internal predecessors, (7597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7597 transitions. [2021-05-03 14:12:51,338 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7597 transitions. Word has length 22 [2021-05-03 14:12:51,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:51,338 INFO L480 AbstractCegarLoop]: Abstraction has 2594 states and 7597 transitions. [2021-05-03 14:12:51,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:51,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7597 transitions. [2021-05-03 14:12:51,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:51,340 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:51,340 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:51,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35575 [2021-05-03 14:12:51,541 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:51,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1633483943, now seen corresponding path program 419 times [2021-05-03 14:12:51,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:51,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315221405] [2021-05-03 14:12:51,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:51,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315221405] [2021-05-03 14:12:51,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497637900] [2021-05-03 14:12:51,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:51,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:12:51,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:51,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:12:51,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:52,502 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:12:52,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:52,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:12:54,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:12:54,565 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:12:54,566 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:12:54,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:12:54,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:12:55,002 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:12:55,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:12:55,004 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:12:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:55,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:55,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:12:55,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317979804] [2021-05-03 14:12:55,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:12:55,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:55,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:12:55,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:12:55,051 INFO L87 Difference]: Start difference. First operand 2594 states and 7597 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:56,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:56,959 INFO L93 Difference]: Finished difference Result 3138 states and 8959 transitions. [2021-05-03 14:12:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 14:12:56,961 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:56,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:56,965 INFO L225 Difference]: With dead ends: 3138 [2021-05-03 14:12:56,965 INFO L226 Difference]: Without dead ends: 3107 [2021-05-03 14:12:56,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1720.9ms TimeCoverageRelationStatistics Valid=313, Invalid=2443, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 14:12:56,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-05-03 14:12:56,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 2554. [2021-05-03 14:12:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 2.928319623971798) internal successors, (7476), 2553 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 7476 transitions. [2021-05-03 14:12:56,998 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 7476 transitions. Word has length 22 [2021-05-03 14:12:56,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:56,998 INFO L480 AbstractCegarLoop]: Abstraction has 2554 states and 7476 transitions. [2021-05-03 14:12:56,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:56,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 7476 transitions. [2021-05-03 14:12:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:57,001 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:57,001 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:57,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36693,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:57,202 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:57,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:57,202 INFO L82 PathProgramCache]: Analyzing trace with hash -539392355, now seen corresponding path program 420 times [2021-05-03 14:12:57,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:57,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347950750] [2021-05-03 14:12:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:57,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347950750] [2021-05-03 14:12:57,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266258436] [2021-05-03 14:12:57,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:57,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:12:57,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:57,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:12:57,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:58,392 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:12:58,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:58,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:13:00,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:13:00,921 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:13:00,921 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:13:00,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:13:01,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:01,790 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:13:01,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:13:01,791 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:13:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:01,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:01,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:13:01,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289755678] [2021-05-03 14:13:01,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:13:01,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:01,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:13:01,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:13:01,836 INFO L87 Difference]: Start difference. First operand 2554 states and 7476 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:02,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:02,848 INFO L93 Difference]: Finished difference Result 3000 states and 8594 transitions. [2021-05-03 14:13:02,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:13:02,849 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:02,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:02,853 INFO L225 Difference]: With dead ends: 3000 [2021-05-03 14:13:02,853 INFO L226 Difference]: Without dead ends: 2990 [2021-05-03 14:13:02,853 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1413.4ms TimeCoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 14:13:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2021-05-03 14:13:02,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 2556. [2021-05-03 14:13:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2555 states have (on average 2.9287671232876713) internal successors, (7483), 2555 states have internal predecessors, (7483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:02,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 7483 transitions. [2021-05-03 14:13:02,884 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 7483 transitions. Word has length 22 [2021-05-03 14:13:02,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:02,884 INFO L480 AbstractCegarLoop]: Abstraction has 2556 states and 7483 transitions. [2021-05-03 14:13:02,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 7483 transitions. [2021-05-03 14:13:02,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:02,887 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:02,887 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:03,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37229 [2021-05-03 14:13:03,090 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:03,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:03,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2125188711, now seen corresponding path program 421 times [2021-05-03 14:13:03,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:03,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630349075] [2021-05-03 14:13:03,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:13:03,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630349075] [2021-05-03 14:13:03,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083185958] [2021-05-03 14:13:03,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:03,301 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:13:03,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:04,079 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:13:04,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:04,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:13:04,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:13:04,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:04,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:13:04,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:13:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:04,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:04,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-05-03 14:13:04,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109291364] [2021-05-03 14:13:04,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:13:04,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:04,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:13:04,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:13:04,908 INFO L87 Difference]: Start difference. First operand 2556 states and 7483 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:05,779 INFO L93 Difference]: Finished difference Result 2587 states and 7530 transitions. [2021-05-03 14:13:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:13:05,780 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:05,784 INFO L225 Difference]: With dead ends: 2587 [2021-05-03 14:13:05,784 INFO L226 Difference]: Without dead ends: 2569 [2021-05-03 14:13:05,784 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 822.7ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:13:05,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-05-03 14:13:05,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2556. [2021-05-03 14:13:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2555 states have (on average 2.9279843444227005) internal successors, (7481), 2555 states have internal predecessors, (7481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 7481 transitions. [2021-05-03 14:13:05,815 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 7481 transitions. Word has length 22 [2021-05-03 14:13:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:05,815 INFO L480 AbstractCegarLoop]: Abstraction has 2556 states and 7481 transitions. [2021-05-03 14:13:05,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 7481 transitions. [2021-05-03 14:13:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:05,817 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:05,817 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:06,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37976,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:06,018 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:06,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1175859209, now seen corresponding path program 422 times [2021-05-03 14:13:06,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:06,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859377366] [2021-05-03 14:13:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:06,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859377366] [2021-05-03 14:13:06,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447415100] [2021-05-03 14:13:06,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:06,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:13:06,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:06,292 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:13:06,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:07,021 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:13:07,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:07,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:13:07,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:13:07,968 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:13:07,969 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:13:07,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:13:08,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:08,761 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:13:08,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:13:08,762 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:13:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:08,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:08,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:13:08,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064719364] [2021-05-03 14:13:08,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:13:08,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:08,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:13:08,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:13:08,822 INFO L87 Difference]: Start difference. First operand 2556 states and 7481 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:10,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:10,828 INFO L93 Difference]: Finished difference Result 3029 states and 8704 transitions. [2021-05-03 14:13:10,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 14:13:10,830 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:10,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:10,834 INFO L225 Difference]: With dead ends: 3029 [2021-05-03 14:13:10,835 INFO L226 Difference]: Without dead ends: 3019 [2021-05-03 14:13:10,835 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1777.6ms TimeCoverageRelationStatistics Valid=290, Invalid=2362, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 14:13:10,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-05-03 14:13:10,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 2564. [2021-05-03 14:13:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 2.928209129925868) internal successors, (7505), 2563 states have internal predecessors, (7505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:10,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 7505 transitions. [2021-05-03 14:13:10,869 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 7505 transitions. Word has length 22 [2021-05-03 14:13:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:10,869 INFO L480 AbstractCegarLoop]: Abstraction has 2564 states and 7505 transitions. [2021-05-03 14:13:10,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 7505 transitions. [2021-05-03 14:13:10,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:10,872 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:10,872 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:11,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38213,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:11,072 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:11,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:11,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2066719163, now seen corresponding path program 423 times [2021-05-03 14:13:11,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:11,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233821450] [2021-05-03 14:13:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:11,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233821450] [2021-05-03 14:13:11,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420906497] [2021-05-03 14:13:11,328 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 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:11,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:13:11,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:11,351 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:13:11,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:12,176 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:13:12,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:12,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:13:15,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:13:15,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:15,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:13:15,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:13:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:15,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:15,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:13:15,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852015223] [2021-05-03 14:13:15,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:13:15,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:15,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:13:15,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:13:15,714 INFO L87 Difference]: Start difference. First operand 2564 states and 7505 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:16,325 INFO L93 Difference]: Finished difference Result 2711 states and 7924 transitions. [2021-05-03 14:13:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:13:16,326 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:16,329 INFO L225 Difference]: With dead ends: 2711 [2021-05-03 14:13:16,329 INFO L226 Difference]: Without dead ends: 2695 [2021-05-03 14:13:16,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 795.8ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:13:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-05-03 14:13:16,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2645. [2021-05-03 14:13:16,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 2.9436459909228443) internal successors, (7783), 2644 states have internal predecessors, (7783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 7783 transitions. [2021-05-03 14:13:16,362 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 7783 transitions. Word has length 22 [2021-05-03 14:13:16,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:16,362 INFO L480 AbstractCegarLoop]: Abstraction has 2645 states and 7783 transitions. [2021-05-03 14:13:16,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:16,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 7783 transitions. [2021-05-03 14:13:16,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:16,365 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:16,365 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:16,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38590,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:16,566 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:16,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:16,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1369373603, now seen corresponding path program 424 times [2021-05-03 14:13:16,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:16,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947254346] [2021-05-03 14:13:16,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:16,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947254346] [2021-05-03 14:13:16,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929135764] [2021-05-03 14:13:16,784 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 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:16,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:13:16,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:16,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:13:16,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:17,380 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:13:17,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:17,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:13:19,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:13:19,772 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:13:19,773 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:13:19,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:13:21,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:21,664 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:13:21,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:13:21,666 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:13:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:21,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:21,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:13:21,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547129144] [2021-05-03 14:13:21,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:13:21,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:21,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:13:21,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:13:21,729 INFO L87 Difference]: Start difference. First operand 2645 states and 7783 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:24,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:24,093 INFO L93 Difference]: Finished difference Result 2975 states and 8581 transitions. [2021-05-03 14:13:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 14:13:24,094 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:24,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:24,098 INFO L225 Difference]: With dead ends: 2975 [2021-05-03 14:13:24,098 INFO L226 Difference]: Without dead ends: 2942 [2021-05-03 14:13:24,099 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1513.6ms TimeCoverageRelationStatistics Valid=304, Invalid=2776, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 14:13:24,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-05-03 14:13:24,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2661. [2021-05-03 14:13:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 2.946240601503759) internal successors, (7837), 2660 states have internal predecessors, (7837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:24,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 7837 transitions. [2021-05-03 14:13:24,132 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 7837 transitions. Word has length 22 [2021-05-03 14:13:24,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:24,132 INFO L480 AbstractCegarLoop]: Abstraction has 2661 states and 7837 transitions. [2021-05-03 14:13:24,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:24,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 7837 transitions. [2021-05-03 14:13:24,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:24,135 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:24,135 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:24,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39416 [2021-05-03 14:13:24,336 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:24,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:24,336 INFO L82 PathProgramCache]: Analyzing trace with hash 341239705, now seen corresponding path program 425 times [2021-05-03 14:13:24,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:24,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093112908] [2021-05-03 14:13:24,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:13:24,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093112908] [2021-05-03 14:13:24,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584270415] [2021-05-03 14:13:24,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:24,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:13:24,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:24,582 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:13:24,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:25,534 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:13:25,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:25,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:13:26,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:13:26,563 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:13:26,564 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:13:26,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:13:29,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:29,377 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:13:29,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:13:29,378 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:13:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:29,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:29,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:13:29,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427092732] [2021-05-03 14:13:29,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:13:29,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:29,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:13:29,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:13:29,447 INFO L87 Difference]: Start difference. First operand 2661 states and 7837 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:31,236 INFO L93 Difference]: Finished difference Result 2918 states and 8462 transitions. [2021-05-03 14:13:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 14:13:31,237 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:31,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:31,241 INFO L225 Difference]: With dead ends: 2918 [2021-05-03 14:13:31,241 INFO L226 Difference]: Without dead ends: 2908 [2021-05-03 14:13:31,241 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1436.6ms TimeCoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 14:13:31,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-05-03 14:13:31,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2687. [2021-05-03 14:13:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.948994787788533) internal successors, (7921), 2686 states have internal predecessors, (7921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7921 transitions. [2021-05-03 14:13:31,268 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7921 transitions. Word has length 22 [2021-05-03 14:13:31,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:31,268 INFO L480 AbstractCegarLoop]: Abstraction has 2687 states and 7921 transitions. [2021-05-03 14:13:31,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:31,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7921 transitions. [2021-05-03 14:13:31,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:31,270 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:31,270 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:31,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40333,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:31,471 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:31,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:31,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1830644701, now seen corresponding path program 426 times [2021-05-03 14:13:31,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:31,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461718769] [2021-05-03 14:13:31,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:31,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461718769] [2021-05-03 14:13:31,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541221700] [2021-05-03 14:13:31,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:31,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:13:31,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:31,731 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:13:31,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:32,472 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:13:32,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:32,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:13:33,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:13:34,187 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:13:34,188 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:13:34,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:13:36,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:36,670 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:13:36,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:13:36,671 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:13:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:36,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:36,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:13:36,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077563078] [2021-05-03 14:13:36,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:13:36,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:36,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:13:36,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:13:36,715 INFO L87 Difference]: Start difference. First operand 2687 states and 7921 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:38,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:38,485 INFO L93 Difference]: Finished difference Result 3155 states and 9023 transitions. [2021-05-03 14:13:38,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 14:13:38,487 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:38,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:38,491 INFO L225 Difference]: With dead ends: 3155 [2021-05-03 14:13:38,491 INFO L226 Difference]: Without dead ends: 3121 [2021-05-03 14:13:38,491 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1546.4ms TimeCoverageRelationStatistics Valid=325, Invalid=2867, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 14:13:38,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-05-03 14:13:38,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2693. [2021-05-03 14:13:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2693 states, 2692 states have (on average 2.947251114413076) internal successors, (7934), 2692 states have internal predecessors, (7934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 7934 transitions. [2021-05-03 14:13:38,525 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 7934 transitions. Word has length 22 [2021-05-03 14:13:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:38,525 INFO L480 AbstractCegarLoop]: Abstraction has 2693 states and 7934 transitions. [2021-05-03 14:13:38,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:38,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 7934 transitions. [2021-05-03 14:13:38,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:38,527 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:38,527 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:38,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41138,431 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:38,728 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:38,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:38,728 INFO L82 PathProgramCache]: Analyzing trace with hash 757559321, now seen corresponding path program 427 times [2021-05-03 14:13:38,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:38,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700461946] [2021-05-03 14:13:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:13:38,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700461946] [2021-05-03 14:13:38,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632482842] [2021-05-03 14:13:38,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:39,002 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:13:39,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:39,749 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:13:39,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:39,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:13:41,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:13:41,799 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:13:41,800 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:13:41,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:13:43,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:43,234 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:13:43,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:13:43,236 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:13:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:43,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:43,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:13:43,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351300894] [2021-05-03 14:13:43,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:13:43,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:43,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:13:43,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:13:43,308 INFO L87 Difference]: Start difference. First operand 2693 states and 7934 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:45,334 INFO L93 Difference]: Finished difference Result 2902 states and 8407 transitions. [2021-05-03 14:13:45,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 14:13:45,336 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:45,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:45,340 INFO L225 Difference]: With dead ends: 2902 [2021-05-03 14:13:45,340 INFO L226 Difference]: Without dead ends: 2887 [2021-05-03 14:13:45,340 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1863.0ms TimeCoverageRelationStatistics Valid=280, Invalid=2270, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 14:13:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-05-03 14:13:45,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2699. [2021-05-03 14:13:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.946256486286138) internal successors, (7949), 2698 states have internal predecessors, (7949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7949 transitions. [2021-05-03 14:13:45,377 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7949 transitions. Word has length 22 [2021-05-03 14:13:45,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:45,377 INFO L480 AbstractCegarLoop]: Abstraction has 2699 states and 7949 transitions. [2021-05-03 14:13:45,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:45,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7949 transitions. [2021-05-03 14:13:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:45,380 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:45,380 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:45,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42142 [2021-05-03 14:13:45,580 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:45,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:45,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1851650909, now seen corresponding path program 428 times [2021-05-03 14:13:45,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:45,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660454530] [2021-05-03 14:13:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:45,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660454530] [2021-05-03 14:13:45,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497755805] [2021-05-03 14:13:45,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:45,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:13:45,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:45,921 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:13:45,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:46,665 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:13:46,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:46,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:13:48,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:13:48,682 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:13:48,683 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:13:48,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:13:51,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:51,748 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:13:51,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:13:51,750 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:13:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:51,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:51,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:13:51,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964825398] [2021-05-03 14:13:51,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:13:51,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:51,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:13:51,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:13:51,824 INFO L87 Difference]: Start difference. First operand 2699 states and 7949 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:53,689 INFO L93 Difference]: Finished difference Result 2977 states and 8602 transitions. [2021-05-03 14:13:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 14:13:53,690 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:53,694 INFO L225 Difference]: With dead ends: 2977 [2021-05-03 14:13:53,694 INFO L226 Difference]: Without dead ends: 2962 [2021-05-03 14:13:53,694 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1765.8ms TimeCoverageRelationStatistics Valid=288, Invalid=2262, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 14:13:53,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2021-05-03 14:13:53,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2699. [2021-05-03 14:13:53,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.9481097108969605) internal successors, (7954), 2698 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7954 transitions. [2021-05-03 14:13:53,728 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7954 transitions. Word has length 22 [2021-05-03 14:13:53,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:53,728 INFO L480 AbstractCegarLoop]: Abstraction has 2699 states and 7954 transitions. [2021-05-03 14:13:53,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:53,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7954 transitions. [2021-05-03 14:13:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:53,731 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:53,731 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:53,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42942,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:53,932 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:53,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:53,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1408751769, now seen corresponding path program 429 times [2021-05-03 14:13:53,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:53,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876363334] [2021-05-03 14:13:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:54,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876363334] [2021-05-03 14:13:54,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658824942] [2021-05-03 14:13:54,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:54,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:13:54,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:54,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:13:54,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:54,784 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:13:54,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:13:54,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:13:57,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:13:57,722 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:13:57,722 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:13:57,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:13:59,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:13:59,047 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:13:59,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:13:59,048 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:13:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:59,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:59,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:13:59,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239412150] [2021-05-03 14:13:59,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:13:59,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:59,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:13:59,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:13:59,120 INFO L87 Difference]: Start difference. First operand 2699 states and 7954 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:00,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:00,714 INFO L93 Difference]: Finished difference Result 2918 states and 8461 transitions. [2021-05-03 14:14:00,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 14:14:00,715 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:00,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:00,719 INFO L225 Difference]: With dead ends: 2918 [2021-05-03 14:14:00,719 INFO L226 Difference]: Without dead ends: 2908 [2021-05-03 14:14:00,719 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1481.2ms TimeCoverageRelationStatistics Valid=269, Invalid=2083, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 14:14:00,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-05-03 14:14:00,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2699. [2021-05-03 14:14:00,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.9481097108969605) internal successors, (7954), 2698 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7954 transitions. [2021-05-03 14:14:00,748 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7954 transitions. Word has length 22 [2021-05-03 14:14:00,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:00,748 INFO L480 AbstractCegarLoop]: Abstraction has 2699 states and 7954 transitions. [2021-05-03 14:14:00,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:00,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7954 transitions. [2021-05-03 14:14:00,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:00,750 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:00,750 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:00,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44081,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:00,951 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:00,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:00,951 INFO L82 PathProgramCache]: Analyzing trace with hash 998887215, now seen corresponding path program 430 times [2021-05-03 14:14:00,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:00,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633800370] [2021-05-03 14:14:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:14:01,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633800370] [2021-05-03 14:14:01,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171727080] [2021-05-03 14:14:01,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:01,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:14:01,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:01,200 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:14:01,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:01,940 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:14:01,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:14:01,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:14:03,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:14:03,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:14:03,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:14:03,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:14:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:03,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:03,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:14:03,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725168080] [2021-05-03 14:14:03,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:14:03,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:03,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:14:03,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:14:03,360 INFO L87 Difference]: Start difference. First operand 2699 states and 7954 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:03,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:03,970 INFO L93 Difference]: Finished difference Result 2738 states and 8012 transitions. [2021-05-03 14:14:03,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:14:03,971 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:03,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:03,974 INFO L225 Difference]: With dead ends: 2738 [2021-05-03 14:14:03,974 INFO L226 Difference]: Without dead ends: 2712 [2021-05-03 14:14:03,975 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 859.8ms TimeCoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:14:03,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-05-03 14:14:03,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2699. [2021-05-03 14:14:03,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.946997776130467) internal successors, (7951), 2698 states have internal predecessors, (7951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7951 transitions. [2021-05-03 14:14:04,001 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7951 transitions. Word has length 22 [2021-05-03 14:14:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:04,001 INFO L480 AbstractCegarLoop]: Abstraction has 2699 states and 7951 transitions. [2021-05-03 14:14:04,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7951 transitions. [2021-05-03 14:14:04,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:04,003 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:04,003 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:04,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45012 [2021-05-03 14:14:04,204 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:04,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:04,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1502482099, now seen corresponding path program 431 times [2021-05-03 14:14:04,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:04,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986806674] [2021-05-03 14:14:04,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:04,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986806674] [2021-05-03 14:14:04,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542245788] [2021-05-03 14:14:04,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:04,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:14:04,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:04,404 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:14:04,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:05,002 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:14:05,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:14:05,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:14:06,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:14:06,617 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:14:06,617 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:14:06,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:14:08,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:14:08,480 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:14:08,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:14:08,482 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:14:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:08,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:08,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:14:08,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094507383] [2021-05-03 14:14:08,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:14:08,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:08,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:14:08,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:14:08,562 INFO L87 Difference]: Start difference. First operand 2699 states and 7951 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:10,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:10,248 INFO L93 Difference]: Finished difference Result 3366 states and 9748 transitions. [2021-05-03 14:14:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 14:14:10,249 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:10,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:10,254 INFO L225 Difference]: With dead ends: 3366 [2021-05-03 14:14:10,254 INFO L226 Difference]: Without dead ends: 3356 [2021-05-03 14:14:10,255 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1473.9ms TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 14:14:10,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-05-03 14:14:10,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2699. [2021-05-03 14:14:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.9458858413639732) internal successors, (7948), 2698 states have internal predecessors, (7948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7948 transitions. [2021-05-03 14:14:10,293 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7948 transitions. Word has length 22 [2021-05-03 14:14:10,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:10,293 INFO L480 AbstractCegarLoop]: Abstraction has 2699 states and 7948 transitions. [2021-05-03 14:14:10,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:10,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7948 transitions. [2021-05-03 14:14:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:10,296 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:10,296 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:10,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45460,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:10,497 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:10,497 INFO L82 PathProgramCache]: Analyzing trace with hash 14616815, now seen corresponding path program 432 times [2021-05-03 14:14:10,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:10,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934527385] [2021-05-03 14:14:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:14:10,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934527385] [2021-05-03 14:14:10,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976426459] [2021-05-03 14:14:10,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:10,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:14:10,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:10,724 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:14:10,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:11,699 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:14:11,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:14:11,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:14:12,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:14:13,001 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:14:13,002 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:14:13,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:14:13,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:14:13,724 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:14:13,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:14:13,725 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:14:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:13,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:13,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:14:13,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151949962] [2021-05-03 14:14:13,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:14:13,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:13,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:14:13,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:14:13,777 INFO L87 Difference]: Start difference. First operand 2699 states and 7948 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:16,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:16,142 INFO L93 Difference]: Finished difference Result 3100 states and 8894 transitions. [2021-05-03 14:14:16,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 14:14:16,144 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:16,148 INFO L225 Difference]: With dead ends: 3100 [2021-05-03 14:14:16,148 INFO L226 Difference]: Without dead ends: 3078 [2021-05-03 14:14:16,148 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1719.7ms TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 14:14:16,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-05-03 14:14:16,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2707. [2021-05-03 14:14:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 2.9464153732446414) internal successors, (7973), 2706 states have internal predecessors, (7973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 7973 transitions. [2021-05-03 14:14:16,181 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 7973 transitions. Word has length 22 [2021-05-03 14:14:16,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:16,181 INFO L480 AbstractCegarLoop]: Abstraction has 2707 states and 7973 transitions. [2021-05-03 14:14:16,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:16,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 7973 transitions. [2021-05-03 14:14:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:16,184 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:16,184 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:16,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46320,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:16,385 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:16,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1504021811, now seen corresponding path program 433 times [2021-05-03 14:14:16,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:16,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702520493] [2021-05-03 14:14:16,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:16,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702520493] [2021-05-03 14:14:16,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957695820] [2021-05-03 14:14:16,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:16,691 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:14:16,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:17,631 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:14:17,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:14:17,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:14:20,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:14:21,036 WARN L205 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:14:21,037 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:14:21,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:14:22,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:14:22,324 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:14:22,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:14:22,326 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:14:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:22,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:22,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:14:22,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141360017] [2021-05-03 14:14:22,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:14:22,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:22,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:14:22,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:14:22,402 INFO L87 Difference]: Start difference. First operand 2707 states and 7973 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:24,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:24,860 INFO L93 Difference]: Finished difference Result 3336 states and 9435 transitions. [2021-05-03 14:14:24,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 14:14:24,862 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:24,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:24,867 INFO L225 Difference]: With dead ends: 3336 [2021-05-03 14:14:24,867 INFO L226 Difference]: Without dead ends: 3288 [2021-05-03 14:14:24,867 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 2169.1ms TimeCoverageRelationStatistics Valid=410, Invalid=3250, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 14:14:24,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2021-05-03 14:14:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2710. [2021-05-03 14:14:24,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 2709 states have (on average 2.9427833148763383) internal successors, (7972), 2709 states have internal predecessors, (7972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:24,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 7972 transitions. [2021-05-03 14:14:24,900 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 7972 transitions. Word has length 22 [2021-05-03 14:14:24,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:24,900 INFO L480 AbstractCegarLoop]: Abstraction has 2710 states and 7972 transitions. [2021-05-03 14:14:24,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:24,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 7972 transitions. [2021-05-03 14:14:24,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:24,903 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:24,903 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:25,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46785 [2021-05-03 14:14:25,104 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:25,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:25,104 INFO L82 PathProgramCache]: Analyzing trace with hash 430936431, now seen corresponding path program 434 times [2021-05-03 14:14:25,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:25,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357282604] [2021-05-03 14:14:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:14:25,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357282604] [2021-05-03 14:14:25,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845404356] [2021-05-03 14:14:25,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:25,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:14:25,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:25,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:14:25,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:26,190 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:14:26,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:14:26,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:14:26,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:14:27,276 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:14:27,277 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:14:27,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:14:29,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:14:29,247 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:14:29,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:14:29,248 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:14:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:29,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:29,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:14:29,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457126881] [2021-05-03 14:14:29,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:14:29,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:29,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:14:29,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:14:29,324 INFO L87 Difference]: Start difference. First operand 2710 states and 7972 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:31,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:31,136 INFO L93 Difference]: Finished difference Result 3007 states and 8651 transitions. [2021-05-03 14:14:31,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 14:14:31,138 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:31,142 INFO L225 Difference]: With dead ends: 3007 [2021-05-03 14:14:31,142 INFO L226 Difference]: Without dead ends: 2992 [2021-05-03 14:14:31,142 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1753.8ms TimeCoverageRelationStatistics Valid=299, Invalid=2353, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 14:14:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-05-03 14:14:31,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2729. [2021-05-03 14:14:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2729 states, 2728 states have (on average 2.941348973607038) internal successors, (8024), 2728 states have internal predecessors, (8024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2729 states to 2729 states and 8024 transitions. [2021-05-03 14:14:31,172 INFO L78 Accepts]: Start accepts. Automaton has 2729 states and 8024 transitions. Word has length 22 [2021-05-03 14:14:31,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:31,173 INFO L480 AbstractCegarLoop]: Abstraction has 2729 states and 8024 transitions. [2021-05-03 14:14:31,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:31,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2729 states and 8024 transitions. [2021-05-03 14:14:31,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:31,175 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:31,175 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:31,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47816,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:31,376 INFO L428 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:31,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:31,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1525028019, now seen corresponding path program 435 times [2021-05-03 14:14:31,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:31,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678816506] [2021-05-03 14:14:31,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:31,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678816506] [2021-05-03 14:14:31,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172474024] [2021-05-03 14:14:31,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:31,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:14:31,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:31,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:14:31,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:32,415 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:14:32,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:14:32,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:14:35,332 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1611 DAG size of output: 853 [2021-05-03 14:14:35,459 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1611 DAG size of output: 853 [2021-05-03 14:14:35,588 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1616 DAG size of output: 858 [2021-05-03 14:14:37,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:14:38,494 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:14:38,495 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:14:38,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:14:40,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:14:40,788 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:14:40,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:14:40,790 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:14:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:40,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:40,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:14:40,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215177792] [2021-05-03 14:14:40,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:14:40,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:40,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:14:40,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:14:40,840 INFO L87 Difference]: Start difference. First operand 2729 states and 8024 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:43,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:43,036 INFO L93 Difference]: Finished difference Result 3110 states and 8920 transitions. [2021-05-03 14:14:43,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 14:14:43,038 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:43,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:43,043 INFO L225 Difference]: With dead ends: 3110 [2021-05-03 14:14:43,043 INFO L226 Difference]: Without dead ends: 3095 [2021-05-03 14:14:43,043 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1887.3ms TimeCoverageRelationStatistics Valid=307, Invalid=2345, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 14:14:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-05-03 14:14:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 2732. [2021-05-03 14:14:43,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 2.943610399121201) internal successors, (8039), 2731 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:43,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 8039 transitions. [2021-05-03 14:14:43,082 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 8039 transitions. Word has length 22 [2021-05-03 14:14:43,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:43,082 INFO L480 AbstractCegarLoop]: Abstraction has 2732 states and 8039 transitions. [2021-05-03 14:14:43,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:43,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 8039 transitions. [2021-05-03 14:14:43,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:43,085 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:43,085 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:43,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48501,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:43,286 INFO L428 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:43,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:43,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1082128879, now seen corresponding path program 436 times [2021-05-03 14:14:43,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:43,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449025457] [2021-05-03 14:14:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:43,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449025457] [2021-05-03 14:14:43,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283506024] [2021-05-03 14:14:43,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:43,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:14:43,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:43,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:14:43,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:44,539 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:14:44,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:14:44,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:14:46,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:14:46,584 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:14:46,584 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:14:46,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:14:47,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:14:48,035 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:14:48,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:14:48,037 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:14:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:48,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:48,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:14:48,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440535297] [2021-05-03 14:14:48,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:14:48,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:48,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:14:48,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:14:48,105 INFO L87 Difference]: Start difference. First operand 2732 states and 8039 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:50,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:50,058 INFO L93 Difference]: Finished difference Result 3038 states and 8759 transitions. [2021-05-03 14:14:50,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:14:50,059 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:50,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:50,063 INFO L225 Difference]: With dead ends: 3038 [2021-05-03 14:14:50,063 INFO L226 Difference]: Without dead ends: 3028 [2021-05-03 14:14:50,063 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1927.3ms TimeCoverageRelationStatistics Valid=288, Invalid=2162, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 14:14:50,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-05-03 14:14:50,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 2734. [2021-05-03 14:14:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2733 states have (on average 2.9425539699963412) internal successors, (8042), 2733 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:50,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 8042 transitions. [2021-05-03 14:14:50,098 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 8042 transitions. Word has length 22 [2021-05-03 14:14:50,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:50,098 INFO L480 AbstractCegarLoop]: Abstraction has 2734 states and 8042 transitions. [2021-05-03 14:14:50,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:50,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 8042 transitions. [2021-05-03 14:14:50,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:50,101 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:50,101 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:50,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50041,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:50,317 INFO L428 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:50,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:50,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1328354231, now seen corresponding path program 437 times [2021-05-03 14:14:50,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:50,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914145569] [2021-05-03 14:14:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:14:50,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914145569] [2021-05-03 14:14:50,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389989331] [2021-05-03 14:14:50,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:50,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:14:50,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:50,614 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:14:50,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:51,404 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:14:51,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:14:51,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:14:52,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:14:53,092 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:14:53,092 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:14:53,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:14:55,263 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 816 [2021-05-03 14:14:57,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:14:57,159 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:14:57,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:14:57,161 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:14:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:57,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:57,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:14:57,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392246244] [2021-05-03 14:14:57,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:14:57,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:57,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:14:57,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:14:57,239 INFO L87 Difference]: Start difference. First operand 2734 states and 8042 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:00,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:00,016 INFO L93 Difference]: Finished difference Result 3510 states and 9948 transitions. [2021-05-03 14:15:00,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 14:15:00,017 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:15:00,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:00,021 INFO L225 Difference]: With dead ends: 3510 [2021-05-03 14:15:00,021 INFO L226 Difference]: Without dead ends: 3469 [2021-05-03 14:15:00,022 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 2244.1ms TimeCoverageRelationStatistics Valid=453, Invalid=3579, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 14:15:00,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-05-03 14:15:00,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 2730. [2021-05-03 14:15:00,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2730 states, 2729 states have (on average 2.9399047270062293) internal successors, (8023), 2729 states have internal predecessors, (8023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 8023 transitions. [2021-05-03 14:15:00,056 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 8023 transitions. Word has length 22 [2021-05-03 14:15:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:00,056 INFO L480 AbstractCegarLoop]: Abstraction has 2730 states and 8023 transitions. [2021-05-03 14:15:00,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:00,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 8023 transitions. [2021-05-03 14:15:00,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:15:00,059 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:00,059 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:00,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50806,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:00,259 INFO L428 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:00,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:00,260 INFO L82 PathProgramCache]: Analyzing trace with hash -234262643, now seen corresponding path program 438 times [2021-05-03 14:15:00,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:00,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797082106] [2021-05-03 14:15:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:00,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797082106] [2021-05-03 14:15:00,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645798367] [2021-05-03 14:15:00,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:00,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:15:00,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:00,559 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:15:00,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:01,485 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:15:01,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:01,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:15:04,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:15:04,557 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:15:04,558 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:15:04,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:15:05,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:05,949 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:15:05,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:15:05,950 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:15:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:05,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:05,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 14:15:05,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873666561] [2021-05-03 14:15:05,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 14:15:05,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:05,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 14:15:05,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:15:05,998 INFO L87 Difference]: Start difference. First operand 2730 states and 8023 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:08,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:08,314 INFO L93 Difference]: Finished difference Result 3643 states and 10471 transitions. [2021-05-03 14:15:08,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 14:15:08,316 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:15:08,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:08,321 INFO L225 Difference]: With dead ends: 3643 [2021-05-03 14:15:08,321 INFO L226 Difference]: Without dead ends: 3610 [2021-05-03 14:15:08,322 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 2108.2ms TimeCoverageRelationStatistics Valid=388, Invalid=3034, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 14:15:08,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-05-03 14:15:08,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2622. [2021-05-03 14:15:08,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2622 states, 2621 states have (on average 2.9355207935902325) internal successors, (7694), 2621 states have internal predecessors, (7694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:08,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2622 states to 2622 states and 7694 transitions. [2021-05-03 14:15:08,358 INFO L78 Accepts]: Start accepts. Automaton has 2622 states and 7694 transitions. Word has length 22 [2021-05-03 14:15:08,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:08,359 INFO L480 AbstractCegarLoop]: Abstraction has 2622 states and 7694 transitions. [2021-05-03 14:15:08,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:08,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2622 states and 7694 transitions. [2021-05-03 14:15:08,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:15:08,361 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:08,361 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:08,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52078,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:08,562 INFO L428 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:08,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:08,562 INFO L82 PathProgramCache]: Analyzing trace with hash -677161783, now seen corresponding path program 439 times [2021-05-03 14:15:08,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:08,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587111673] [2021-05-03 14:15:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:08,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587111673] [2021-05-03 14:15:08,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830313653] [2021-05-03 14:15:08,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:08,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:15:08,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:09,800 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:15:09,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:09,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:15:10,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:15:10,802 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:15:10,802 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:15:10,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:15:11,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:11,564 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:15:11,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:15:11,565 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:15:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:11,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:11,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 14:15:11,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384730549] [2021-05-03 14:15:11,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 14:15:11,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:11,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 14:15:11,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:15:11,634 INFO L87 Difference]: Start difference. First operand 2622 states and 7694 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:13,780 INFO L93 Difference]: Finished difference Result 3243 states and 9300 transitions. [2021-05-03 14:15:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 14:15:13,781 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:15:13,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:13,785 INFO L225 Difference]: With dead ends: 3243 [2021-05-03 14:15:13,785 INFO L226 Difference]: Without dead ends: 3233 [2021-05-03 14:15:13,785 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 2038.4ms TimeCoverageRelationStatistics Valid=310, Invalid=2446, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 14:15:13,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3233 states. [2021-05-03 14:15:13,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3233 to 2624. [2021-05-03 14:15:13,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.9363324437666796) internal successors, (7702), 2623 states have internal predecessors, (7702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 7702 transitions. [2021-05-03 14:15:13,812 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 7702 transitions. Word has length 22 [2021-05-03 14:15:13,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:13,812 INFO L480 AbstractCegarLoop]: Abstraction has 2624 states and 7702 transitions. [2021-05-03 14:15:13,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:13,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 7702 transitions. [2021-05-03 14:15:13,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:15:13,814 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:13,814 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:14,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52999 [2021-05-03 14:15:14,014 INFO L428 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:14,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:14,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1067202223, now seen corresponding path program 440 times [2021-05-03 14:15:14,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:14,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223555713] [2021-05-03 14:15:14,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:14,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223555713] [2021-05-03 14:15:14,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325047314] [2021-05-03 14:15:14,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:14,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:15:14,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:14,242 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:15:14,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:14,895 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:15:14,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:14,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:15:16,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:15:16,633 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:15:16,634 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:15:16,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:15:17,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:17,399 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:15:17,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:15:17,400 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:15:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:17,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:17,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 14:15:17,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933018047] [2021-05-03 14:15:17,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 14:15:17,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:17,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 14:15:17,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:15:17,452 INFO L87 Difference]: Start difference. First operand 2624 states and 7702 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:19,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:19,835 INFO L93 Difference]: Finished difference Result 3200 states and 9255 transitions. [2021-05-03 14:15:19,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 14:15:19,836 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:15:19,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:19,840 INFO L225 Difference]: With dead ends: 3200 [2021-05-03 14:15:19,840 INFO L226 Difference]: Without dead ends: 3190 [2021-05-03 14:15:19,841 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 2024.8ms TimeCoverageRelationStatistics Valid=365, Invalid=2715, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 14:15:19,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-05-03 14:15:19,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2692. [2021-05-03 14:15:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2691 states have (on average 2.938684503901895) internal successors, (7908), 2691 states have internal predecessors, (7908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:19,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 7908 transitions. [2021-05-03 14:15:19,874 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 7908 transitions. Word has length 22 [2021-05-03 14:15:19,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:19,874 INFO L480 AbstractCegarLoop]: Abstraction has 2692 states and 7908 transitions. [2021-05-03 14:15:19,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:19,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 7908 transitions. [2021-05-03 14:15:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:15:19,877 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:19,877 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:20,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53338 [2021-05-03 14:15:20,077 INFO L428 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:20,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:20,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1088702763, now seen corresponding path program 441 times [2021-05-03 14:15:20,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:20,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299395440] [2021-05-03 14:15:20,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:20,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299395440] [2021-05-03 14:15:20,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019107913] [2021-05-03 14:15:20,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:20,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:15:20,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:20,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:15:20,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:21,061 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:15:21,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:21,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:15:21,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:15:21,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:21,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:15:21,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:15:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:21,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:21,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:15:21,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077759908] [2021-05-03 14:15:21,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:15:21,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:21,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:15:21,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:15:21,551 INFO L87 Difference]: Start difference. First operand 2692 states and 7908 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:22,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:22,993 INFO L93 Difference]: Finished difference Result 2915 states and 8552 transitions. [2021-05-03 14:15:22,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:15:22,995 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:15:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:23,000 INFO L225 Difference]: With dead ends: 2915 [2021-05-03 14:15:23,000 INFO L226 Difference]: Without dead ends: 2897 [2021-05-03 14:15:23,000 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 758.0ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:15:23,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-05-03 14:15:23,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2847. [2021-05-03 14:15:23,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.95572733661279) internal successors, (8412), 2846 states have internal predecessors, (8412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:23,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 8412 transitions. [2021-05-03 14:15:23,039 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 8412 transitions. Word has length 22 [2021-05-03 14:15:23,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:23,039 INFO L480 AbstractCegarLoop]: Abstraction has 2847 states and 8412 transitions. [2021-05-03 14:15:23,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:23,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 8412 transitions. [2021-05-03 14:15:23,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:15:23,043 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:23,043 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:23,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54056,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:23,244 INFO L428 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:23,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:23,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1947577293, now seen corresponding path program 442 times [2021-05-03 14:15:23,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:23,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354400151] [2021-05-03 14:15:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:15:23,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354400151] [2021-05-03 14:15:23,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265598344] [2021-05-03 14:15:23,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:23,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:15:23,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:23,540 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:15:23,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:24,314 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:15:24,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:24,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:15:25,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:15:25,637 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:15:25,637 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:15:25,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:15:26,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:26,329 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:15:26,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:15:26,331 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:15:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:26,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:26,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:15:26,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373762671] [2021-05-03 14:15:26,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:15:26,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:26,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:15:26,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:15:26,407 INFO L87 Difference]: Start difference. First operand 2847 states and 8412 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:30,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:30,891 INFO L93 Difference]: Finished difference Result 3268 states and 9465 transitions. [2021-05-03 14:15:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 14:15:30,893 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:15:30,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:30,897 INFO L225 Difference]: With dead ends: 3268 [2021-05-03 14:15:30,898 INFO L226 Difference]: Without dead ends: 3228 [2021-05-03 14:15:30,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 2350.7ms TimeCoverageRelationStatistics Valid=367, Invalid=3173, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 14:15:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-05-03 14:15:30,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2862. [2021-05-03 14:15:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 2.9598042642432714) internal successors, (8468), 2861 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:30,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 8468 transitions. [2021-05-03 14:15:30,935 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 8468 transitions. Word has length 22 [2021-05-03 14:15:30,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:30,935 INFO L480 AbstractCegarLoop]: Abstraction has 2862 states and 8468 transitions. [2021-05-03 14:15:30,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:30,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 8468 transitions. [2021-05-03 14:15:30,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:15:30,939 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:30,939 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:31,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54227,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:31,139 INFO L428 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:31,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:31,139 INFO L82 PathProgramCache]: Analyzing trace with hash -636776695, now seen corresponding path program 443 times [2021-05-03 14:15:31,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:31,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235047504] [2021-05-03 14:15:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:31,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235047504] [2021-05-03 14:15:31,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736088388] [2021-05-03 14:15:31,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:31,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:15:31,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:31,358 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:15:31,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:32,333 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:15:32,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:32,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:15:33,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:15:33,842 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:15:33,843 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:15:33,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:15:34,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:34,657 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:15:34,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:15:34,659 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:15:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:34,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:34,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:15:34,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747186828] [2021-05-03 14:15:34,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:15:34,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:34,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:15:34,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:15:34,749 INFO L87 Difference]: Start difference. First operand 2862 states and 8468 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:38,733 INFO L93 Difference]: Finished difference Result 3624 states and 10394 transitions. [2021-05-03 14:15:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 14:15:38,734 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:15:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:38,739 INFO L225 Difference]: With dead ends: 3624 [2021-05-03 14:15:38,739 INFO L226 Difference]: Without dead ends: 3563 [2021-05-03 14:15:38,739 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 2545.5ms TimeCoverageRelationStatistics Valid=541, Invalid=4289, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 14:15:38,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-05-03 14:15:38,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 2882. [2021-05-03 14:15:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2882 states, 2881 states have (on average 2.9597362027073935) internal successors, (8527), 2881 states have internal predecessors, (8527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2882 states to 2882 states and 8527 transitions. [2021-05-03 14:15:38,771 INFO L78 Accepts]: Start accepts. Automaton has 2882 states and 8527 transitions. Word has length 22 [2021-05-03 14:15:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:38,771 INFO L480 AbstractCegarLoop]: Abstraction has 2882 states and 8527 transitions. [2021-05-03 14:15:38,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:38,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2882 states and 8527 transitions. [2021-05-03 14:15:38,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:15:38,774 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:38,774 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:38,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54711,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:38,974 INFO L428 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:38,975 INFO L82 PathProgramCache]: Analyzing trace with hash 852628301, now seen corresponding path program 444 times [2021-05-03 14:15:38,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:38,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221026230] [2021-05-03 14:15:38,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:15:39,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221026230] [2021-05-03 14:15:39,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165590130] [2021-05-03 14:15:39,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:39,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:15:39,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:39,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:15:39,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:40,421 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:15:40,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:40,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:15:41,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:15:42,168 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:15:42,169 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:15:42,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:15:44,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:44,538 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:15:44,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:15:44,539 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:15:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:44,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:44,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:15:44,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766372387] [2021-05-03 14:15:44,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:15:44,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:44,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:15:44,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:15:44,591 INFO L87 Difference]: Start difference. First operand 2882 states and 8527 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:47,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:47,676 INFO L93 Difference]: Finished difference Result 3383 states and 9835 transitions. [2021-05-03 14:15:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 14:15:47,678 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:15:47,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:47,682 INFO L225 Difference]: With dead ends: 3383 [2021-05-03 14:15:47,682 INFO L226 Difference]: Without dead ends: 3368 [2021-05-03 14:15:47,683 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 2096.7ms TimeCoverageRelationStatistics Valid=305, Invalid=2665, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 14:15:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-05-03 14:15:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 2956. [2021-05-03 14:15:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.964128595600677) internal successors, (8759), 2955 states have internal predecessors, (8759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:47,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 8759 transitions. [2021-05-03 14:15:47,719 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 8759 transitions. Word has length 22 [2021-05-03 14:15:47,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:47,719 INFO L480 AbstractCegarLoop]: Abstraction has 2956 states and 8759 transitions. [2021-05-03 14:15:47,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:47,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 8759 transitions. [2021-05-03 14:15:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:15:47,722 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:47,722 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:47,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55153,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:47,923 INFO L428 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:47,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:47,923 INFO L82 PathProgramCache]: Analyzing trace with hash -220457079, now seen corresponding path program 445 times [2021-05-03 14:15:47,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:47,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085497013] [2021-05-03 14:15:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:48,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085497013] [2021-05-03 14:15:48,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028079482] [2021-05-03 14:15:48,261 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 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:48,283 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:15:48,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:49,134 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:15:49,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:49,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:15:50,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:15:50,931 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:15:50,932 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:15:50,932 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 41 treesize of output 287 [2021-05-03 14:15:51,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:15:51,416 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:15:51,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:15:51,417 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:15:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:51,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:51,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:15:51,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13821510] [2021-05-03 14:15:51,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:15:51,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:51,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:15:51,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:15:51,467 INFO L87 Difference]: Start difference. First operand 2956 states and 8759 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:54,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:54,149 INFO L93 Difference]: Finished difference Result 3629 states and 10445 transitions. [2021-05-03 14:15:54,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 14:15:54,149 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:15:54,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:54,154 INFO L225 Difference]: With dead ends: 3629 [2021-05-03 14:15:54,154 INFO L226 Difference]: Without dead ends: 3597 [2021-05-03 14:15:54,155 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 2252.1ms TimeCoverageRelationStatistics Valid=456, Invalid=3834, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 14:15:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2021-05-03 14:15:54,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 2955. [2021-05-03 14:15:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 2.9617467840216656) internal successors, (8749), 2954 states have internal predecessors, (8749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 8749 transitions. [2021-05-03 14:15:54,209 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 8749 transitions. Word has length 22 [2021-05-03 14:15:54,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:54,209 INFO L480 AbstractCegarLoop]: Abstraction has 2955 states and 8749 transitions. [2021-05-03 14:15:54,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 8749 transitions. [2021-05-03 14:15:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:15:54,212 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:54,212 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:54,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55999,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:54,412 INFO L428 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:54,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:54,414 INFO L82 PathProgramCache]: Analyzing trace with hash 873634509, now seen corresponding path program 446 times [2021-05-03 14:15:54,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:54,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738326760] [2021-05-03 14:15:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:15:54,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738326760] [2021-05-03 14:15:54,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48125978] [2021-05-03 14:15:54,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:54,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:15:54,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:54,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:15:54,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:55,740 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:15:55,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:55,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:15:56,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:15:57,382 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:15:57,383 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:15:57,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:16:00,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:00,822 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:16:00,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:16:00,824 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:16:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:00,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:00,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:16:00,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717596302] [2021-05-03 14:16:00,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:16:00,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:00,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:16:00,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:16:00,928 INFO L87 Difference]: Start difference. First operand 2955 states and 8749 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:03,471 INFO L93 Difference]: Finished difference Result 3260 states and 9483 transitions. [2021-05-03 14:16:03,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 14:16:03,473 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:16:03,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:03,477 INFO L225 Difference]: With dead ends: 3260 [2021-05-03 14:16:03,477 INFO L226 Difference]: Without dead ends: 3245 [2021-05-03 14:16:03,477 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 2430.1ms TimeCoverageRelationStatistics Valid=361, Invalid=2609, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 14:16:03,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-05-03 14:16:03,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2963. [2021-05-03 14:16:03,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 2962 states have (on average 2.960837272113437) internal successors, (8770), 2962 states have internal predecessors, (8770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:03,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 8770 transitions. [2021-05-03 14:16:03,508 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 8770 transitions. Word has length 22 [2021-05-03 14:16:03,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:03,508 INFO L480 AbstractCegarLoop]: Abstraction has 2963 states and 8770 transitions. [2021-05-03 14:16:03,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:03,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 8770 transitions. [2021-05-03 14:16:03,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:16:03,511 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:03,511 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:03,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56654 [2021-05-03 14:16:03,711 INFO L428 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:03,712 INFO L82 PathProgramCache]: Analyzing trace with hash 430735369, now seen corresponding path program 447 times [2021-05-03 14:16:03,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:03,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144752921] [2021-05-03 14:16:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:03,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144752921] [2021-05-03 14:16:03,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486940312] [2021-05-03 14:16:03,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:04,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:16:04,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:04,002 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:16:04,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:05,129 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:16:05,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:16:05,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:16:05,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:16:06,364 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:16:06,365 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:16:06,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:16:06,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:06,966 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:16:06,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:16:06,968 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:16:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:07,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:07,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 14:16:07,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875715624] [2021-05-03 14:16:07,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 14:16:07,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:07,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 14:16:07,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:16:07,057 INFO L87 Difference]: Start difference. First operand 2963 states and 8770 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:10,034 INFO L93 Difference]: Finished difference Result 3373 states and 9785 transitions. [2021-05-03 14:16:10,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 14:16:10,036 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:16:10,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:10,041 INFO L225 Difference]: With dead ends: 3373 [2021-05-03 14:16:10,041 INFO L226 Difference]: Without dead ends: 3358 [2021-05-03 14:16:10,041 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2473.2ms TimeCoverageRelationStatistics Valid=347, Invalid=2515, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 14:16:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3358 states. [2021-05-03 14:16:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3358 to 2965. [2021-05-03 14:16:10,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 2.9625506072874495) internal successors, (8781), 2964 states have internal predecessors, (8781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:10,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 8781 transitions. [2021-05-03 14:16:10,081 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 8781 transitions. Word has length 22 [2021-05-03 14:16:10,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:10,081 INFO L480 AbstractCegarLoop]: Abstraction has 2965 states and 8781 transitions. [2021-05-03 14:16:10,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 8781 transitions. [2021-05-03 14:16:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:16:10,085 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:10,085 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:10,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57554 [2021-05-03 14:16:10,285 INFO L428 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:10,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:10,285 INFO L82 PathProgramCache]: Analyzing trace with hash -414236083, now seen corresponding path program 448 times [2021-05-03 14:16:10,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:10,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814711022] [2021-05-03 14:16:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:10,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814711022] [2021-05-03 14:16:10,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104462335] [2021-05-03 14:16:10,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:10,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:16:10,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:10,648 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:16:10,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:11,615 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:16:11,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:16:11,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:16:12,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:16:13,106 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:16:13,107 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:16:13,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:16:14,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:14,842 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:16:14,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:16:14,843 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:16:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:14,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:14,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 14:16:14,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523387424] [2021-05-03 14:16:14,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 14:16:14,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:14,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 14:16:14,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:16:14,897 INFO L87 Difference]: Start difference. First operand 2965 states and 8781 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:17,576 INFO L93 Difference]: Finished difference Result 3250 states and 9460 transitions. [2021-05-03 14:16:17,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 14:16:17,578 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:16:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:17,583 INFO L225 Difference]: With dead ends: 3250 [2021-05-03 14:16:17,583 INFO L226 Difference]: Without dead ends: 3240 [2021-05-03 14:16:17,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 2451.0ms TimeCoverageRelationStatistics Valid=324, Invalid=2328, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 14:16:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2021-05-03 14:16:17,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 2965. [2021-05-03 14:16:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 2.9625506072874495) internal successors, (8781), 2964 states have internal predecessors, (8781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:17,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 8781 transitions. [2021-05-03 14:16:17,621 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 8781 transitions. Word has length 22 [2021-05-03 14:16:17,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:17,621 INFO L480 AbstractCegarLoop]: Abstraction has 2965 states and 8781 transitions. [2021-05-03 14:16:17,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:17,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 8781 transitions. [2021-05-03 14:16:17,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:16:17,624 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:17,624 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:17,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57851,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:17,825 INFO L428 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:17,825 INFO L82 PathProgramCache]: Analyzing trace with hash -536487783, now seen corresponding path program 449 times [2021-05-03 14:16:17,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:17,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325494348] [2021-05-03 14:16:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:18,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325494348] [2021-05-03 14:16:18,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527053025] [2021-05-03 14:16:18,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:18,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:16:18,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:18,078 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:16:18,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:19,362 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:16:19,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:16:19,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:16:20,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:16:20,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:16:20,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:16:20,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:16:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:20,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:20,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:16:20,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319301222] [2021-05-03 14:16:20,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:16:20,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:20,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:16:20,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:16:20,717 INFO L87 Difference]: Start difference. First operand 2965 states and 8781 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:22,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:22,359 INFO L93 Difference]: Finished difference Result 3016 states and 8861 transitions. [2021-05-03 14:16:22,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:16:22,360 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:16:22,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:22,364 INFO L225 Difference]: With dead ends: 3016 [2021-05-03 14:16:22,364 INFO L226 Difference]: Without dead ends: 2990 [2021-05-03 14:16:22,364 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1307.7ms TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 14:16:22,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2021-05-03 14:16:22,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 2965. [2021-05-03 14:16:22,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 2.9612010796221324) internal successors, (8777), 2964 states have internal predecessors, (8777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:22,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 8777 transitions. [2021-05-03 14:16:22,399 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 8777 transitions. Word has length 22 [2021-05-03 14:16:22,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:22,399 INFO L480 AbstractCegarLoop]: Abstraction has 2965 states and 8777 transitions. [2021-05-03 14:16:22,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:22,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 8777 transitions. [2021-05-03 14:16:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:16:22,402 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:22,402 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:22,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58565 [2021-05-03 14:16:22,603 INFO L428 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:22,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:22,603 INFO L82 PathProgramCache]: Analyzing trace with hash -468172775, now seen corresponding path program 450 times [2021-05-03 14:16:22,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:22,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448971526] [2021-05-03 14:16:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:23,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448971526] [2021-05-03 14:16:23,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603172484] [2021-05-03 14:16:23,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:23,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:16:23,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:23,028 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:16:23,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:24,135 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:16:24,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:16:24,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:16:25,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:16:25,719 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:16:25,721 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:16:25,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:16:26,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:26,806 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:16:26,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:16:26,808 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:16:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:26,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:26,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 14:16:26,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265311871] [2021-05-03 14:16:26,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 14:16:26,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:26,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 14:16:26,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:16:26,909 INFO L87 Difference]: Start difference. First operand 2965 states and 8777 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:30,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:30,500 INFO L93 Difference]: Finished difference Result 3832 states and 11188 transitions. [2021-05-03 14:16:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 14:16:30,502 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:16:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:30,507 INFO L225 Difference]: With dead ends: 3832 [2021-05-03 14:16:30,507 INFO L226 Difference]: Without dead ends: 3822 [2021-05-03 14:16:30,507 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 3154.9ms TimeCoverageRelationStatistics Valid=400, Invalid=3140, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 14:16:30,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-05-03 14:16:30,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 2972. [2021-05-03 14:16:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2972 states, 2971 states have (on average 2.9619656681252104) internal successors, (8800), 2971 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 8800 transitions. [2021-05-03 14:16:30,548 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 8800 transitions. Word has length 22 [2021-05-03 14:16:30,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:30,548 INFO L480 AbstractCegarLoop]: Abstraction has 2972 states and 8800 transitions. [2021-05-03 14:16:30,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:30,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 8800 transitions. [2021-05-03 14:16:30,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:16:30,551 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:30,551 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:30,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58907 [2021-05-03 14:16:30,752 INFO L428 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:30,752 INFO L82 PathProgramCache]: Analyzing trace with hash -682746697, now seen corresponding path program 451 times [2021-05-03 14:16:30,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:30,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038662826] [2021-05-03 14:16:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:16:31,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038662826] [2021-05-03 14:16:31,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601846503] [2021-05-03 14:16:31,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:31,032 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:16:31,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:31,988 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:16:31,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:16:31,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:16:32,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:16:33,425 WARN L205 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:16:33,426 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:16:33,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:16:35,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:35,619 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:16:35,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:16:35,620 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:16:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:35,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:35,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:16:35,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302878050] [2021-05-03 14:16:35,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:16:35,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:35,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:16:35,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:16:35,672 INFO L87 Difference]: Start difference. First operand 2972 states and 8800 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:38,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:38,920 INFO L93 Difference]: Finished difference Result 3762 states and 10747 transitions. [2021-05-03 14:16:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 14:16:38,922 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:16:38,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:38,927 INFO L225 Difference]: With dead ends: 3762 [2021-05-03 14:16:38,927 INFO L226 Difference]: Without dead ends: 3707 [2021-05-03 14:16:38,927 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 2211.0ms TimeCoverageRelationStatistics Valid=499, Invalid=4057, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 14:16:38,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2021-05-03 14:16:38,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 2980. [2021-05-03 14:16:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 2.959718026183283) internal successors, (8817), 2979 states have internal predecessors, (8817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:38,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 8817 transitions. [2021-05-03 14:16:38,967 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 8817 transitions. Word has length 22 [2021-05-03 14:16:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:38,968 INFO L480 AbstractCegarLoop]: Abstraction has 2980 states and 8817 transitions. [2021-05-03 14:16:38,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 8817 transitions. [2021-05-03 14:16:38,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:16:38,973 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:38,973 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:39,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59326 [2021-05-03 14:16:39,188 INFO L428 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:39,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:39,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1755832077, now seen corresponding path program 452 times [2021-05-03 14:16:39,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:39,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682524774] [2021-05-03 14:16:39,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:39,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682524774] [2021-05-03 14:16:39,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538542577] [2021-05-03 14:16:39,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:39,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:16:39,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:39,411 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:16:39,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:40,157 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:16:40,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:16:40,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:16:41,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:16:41,852 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:16:41,853 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:16:41,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:16:42,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:42,464 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:16:42,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:16:42,466 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:16:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:42,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:42,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:16:42,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844701458] [2021-05-03 14:16:42,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:16:42,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:42,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:16:42,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:16:42,566 INFO L87 Difference]: Start difference. First operand 2980 states and 8817 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:46,504 INFO L93 Difference]: Finished difference Result 3987 states and 11396 transitions. [2021-05-03 14:16:46,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 14:16:46,506 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:16:46,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:46,511 INFO L225 Difference]: With dead ends: 3987 [2021-05-03 14:16:46,511 INFO L226 Difference]: Without dead ends: 3932 [2021-05-03 14:16:46,511 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2960.0ms TimeCoverageRelationStatistics Valid=575, Invalid=4681, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 14:16:46,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2021-05-03 14:16:46,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 2986. [2021-05-03 14:16:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 2.9591289782244554) internal successors, (8833), 2985 states have internal predecessors, (8833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:46,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 8833 transitions. [2021-05-03 14:16:46,552 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 8833 transitions. Word has length 22 [2021-05-03 14:16:46,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:46,552 INFO L480 AbstractCegarLoop]: Abstraction has 2986 states and 8833 transitions. [2021-05-03 14:16:46,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:46,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 8833 transitions. [2021-05-03 14:16:46,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:16:46,555 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:46,555 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:46,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60009 [2021-05-03 14:16:46,756 INFO L428 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:46,756 INFO L82 PathProgramCache]: Analyzing trace with hash -661740489, now seen corresponding path program 453 times [2021-05-03 14:16:46,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:46,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987524863] [2021-05-03 14:16:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:16:47,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987524863] [2021-05-03 14:16:47,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055353590] [2021-05-03 14:16:47,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:47,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:16:47,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:47,024 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:16:47,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:48,043 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:16:48,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:16:48,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:16:49,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:16:49,931 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:16:49,932 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:16:49,932 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 41 treesize of output 287 [2021-05-03 14:16:52,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:16:52,841 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:16:52,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:16:52,843 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:16:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:52,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:16:52,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:16:52,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303182590] [2021-05-03 14:16:52,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:16:52,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:16:52,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:16:52,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:16:52,927 INFO L87 Difference]: Start difference. First operand 2986 states and 8833 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:56,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:16:56,036 INFO L93 Difference]: Finished difference Result 3474 states and 10057 transitions. [2021-05-03 14:16:56,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 14:16:56,038 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:16:56,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:16:56,044 INFO L225 Difference]: With dead ends: 3474 [2021-05-03 14:16:56,044 INFO L226 Difference]: Without dead ends: 3459 [2021-05-03 14:16:56,044 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 2511.7ms TimeCoverageRelationStatistics Valid=377, Invalid=2815, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 14:16:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3459 states. [2021-05-03 14:16:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 3009. [2021-05-03 14:16:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.95844414893617) internal successors, (8899), 3008 states have internal predecessors, (8899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 8899 transitions. [2021-05-03 14:16:56,089 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 8899 transitions. Word has length 22 [2021-05-03 14:16:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:16:56,089 INFO L480 AbstractCegarLoop]: Abstraction has 3009 states and 8899 transitions. [2021-05-03 14:16:56,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:16:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 8899 transitions. [2021-05-03 14:16:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:16:56,093 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:16:56,093 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:16:56,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60405 [2021-05-03 14:16:56,293 INFO L428 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:16:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:16:56,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1104639629, now seen corresponding path program 454 times [2021-05-03 14:16:56,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:16:56,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030109381] [2021-05-03 14:16:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:16:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:16:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:16:56,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030109381] [2021-05-03 14:16:56,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127494818] [2021-05-03 14:16:56,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:16:56,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:16:56,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:16:56,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:16:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:16:57,598 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:16:57,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:16:57,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:17:01,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:17:01,479 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:17:01,481 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:17:01,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:17:02,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:17:02,665 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:17:02,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:17:02,667 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:17:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:02,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:02,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 14:17:02,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889132954] [2021-05-03 14:17:02,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 14:17:02,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:02,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 14:17:02,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:17:02,722 INFO L87 Difference]: Start difference. First operand 3009 states and 8899 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:04,562 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-05-03 14:17:05,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:05,730 INFO L93 Difference]: Finished difference Result 3621 states and 10478 transitions. [2021-05-03 14:17:05,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 14:17:05,732 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:17:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:05,737 INFO L225 Difference]: With dead ends: 3621 [2021-05-03 14:17:05,737 INFO L226 Difference]: Without dead ends: 3606 [2021-05-03 14:17:05,738 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 2795.1ms TimeCoverageRelationStatistics Valid=363, Invalid=2717, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 14:17:05,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-05-03 14:17:05,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3017. [2021-05-03 14:17:05,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9608753315649867) internal successors, (8930), 3016 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:05,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8930 transitions. [2021-05-03 14:17:05,779 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8930 transitions. Word has length 22 [2021-05-03 14:17:05,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:05,779 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8930 transitions. [2021-05-03 14:17:05,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:05,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8930 transitions. [2021-05-03 14:17:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:17:05,783 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:05,783 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:05,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61367,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:05,983 INFO L428 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:05,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1949611081, now seen corresponding path program 455 times [2021-05-03 14:17:05,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:05,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683267066] [2021-05-03 14:17:05,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:06,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683267066] [2021-05-03 14:17:06,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160540716] [2021-05-03 14:17:06,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:06,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:17:06,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:06,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:17:06,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:07,515 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:17:07,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:17:07,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:17:08,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:17:09,544 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:17:09,545 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:17:09,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:17:10,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:17:10,742 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:17:10,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:17:10,743 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:17:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:10,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:10,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 14:17:10,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986381678] [2021-05-03 14:17:10,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 14:17:10,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:10,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 14:17:10,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:17:10,801 INFO L87 Difference]: Start difference. First operand 3017 states and 8930 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:13,268 INFO L93 Difference]: Finished difference Result 3506 states and 10182 transitions. [2021-05-03 14:17:13,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:17:13,270 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:17:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:13,275 INFO L225 Difference]: With dead ends: 3506 [2021-05-03 14:17:13,275 INFO L226 Difference]: Without dead ends: 3496 [2021-05-03 14:17:13,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 2508.3ms TimeCoverageRelationStatistics Valid=340, Invalid=2522, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 14:17:13,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-05-03 14:17:13,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3017. [2021-05-03 14:17:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9608753315649867) internal successors, (8930), 3016 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:13,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8930 transitions. [2021-05-03 14:17:13,320 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8930 transitions. Word has length 22 [2021-05-03 14:17:13,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:13,320 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8930 transitions. [2021-05-03 14:17:13,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8930 transitions. [2021-05-03 14:17:13,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:17:13,325 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:13,325 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:13,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62567,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:13,541 INFO L428 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:13,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:13,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1255070853, now seen corresponding path program 456 times [2021-05-03 14:17:13,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:13,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516860174] [2021-05-03 14:17:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:13,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516860174] [2021-05-03 14:17:13,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171534629] [2021-05-03 14:17:13,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:13,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:17:13,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:13,836 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:17:13,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:14,541 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:17:14,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:17:14,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:17:17,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:17:17,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:17:17,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:17:17,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:17:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:17,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:17,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:17:17,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45934838] [2021-05-03 14:17:17,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:17:17,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:17,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:17:17,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:17:17,422 INFO L87 Difference]: Start difference. First operand 3017 states and 8930 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:18,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:18,387 INFO L93 Difference]: Finished difference Result 3058 states and 8994 transitions. [2021-05-03 14:17:18,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:17:18,389 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:17:18,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:18,392 INFO L225 Difference]: With dead ends: 3058 [2021-05-03 14:17:18,392 INFO L226 Difference]: Without dead ends: 3036 [2021-05-03 14:17:18,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 867.7ms TimeCoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 14:17:18,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2021-05-03 14:17:18,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 3017. [2021-05-03 14:17:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9602122015915118) internal successors, (8928), 3016 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:18,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8928 transitions. [2021-05-03 14:17:18,425 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8928 transitions. Word has length 22 [2021-05-03 14:17:18,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:18,425 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 8928 transitions. [2021-05-03 14:17:18,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:18,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8928 transitions. [2021-05-03 14:17:18,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:17:18,427 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:18,428 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:18,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63181 [2021-05-03 14:17:18,628 INFO L428 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:18,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:18,628 INFO L82 PathProgramCache]: Analyzing trace with hash 634823837, now seen corresponding path program 457 times [2021-05-03 14:17:18,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:18,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309281873] [2021-05-03 14:17:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:17:18,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309281873] [2021-05-03 14:17:18,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188092694] [2021-05-03 14:17:18,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:18,865 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:17:18,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:19,678 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:17:19,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:17:19,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:17:20,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:17:21,019 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:17:21,020 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:17:21,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:17:21,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:17:21,753 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:17:21,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:17:21,754 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:17:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:21,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:21,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:17:21,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435382137] [2021-05-03 14:17:21,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:17:21,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:21,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:17:21,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:17:21,839 INFO L87 Difference]: Start difference. First operand 3017 states and 8928 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:24,925 INFO L93 Difference]: Finished difference Result 4229 states and 12230 transitions. [2021-05-03 14:17:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 14:17:24,927 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:17:24,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:24,933 INFO L225 Difference]: With dead ends: 4229 [2021-05-03 14:17:24,933 INFO L226 Difference]: Without dead ends: 4200 [2021-05-03 14:17:24,934 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 2592.3ms TimeCoverageRelationStatistics Valid=501, Invalid=4055, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 14:17:24,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-05-03 14:17:24,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 3101. [2021-05-03 14:17:24,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 2.963225806451613) internal successors, (9186), 3100 states have internal predecessors, (9186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:24,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 9186 transitions. [2021-05-03 14:17:24,981 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 9186 transitions. Word has length 22 [2021-05-03 14:17:24,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:24,981 INFO L480 AbstractCegarLoop]: Abstraction has 3101 states and 9186 transitions. [2021-05-03 14:17:24,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:24,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 9186 transitions. [2021-05-03 14:17:24,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:17:24,984 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:24,984 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:25,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63966 [2021-05-03 14:17:25,185 INFO L428 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:25,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:25,185 INFO L82 PathProgramCache]: Analyzing trace with hash 191924697, now seen corresponding path program 458 times [2021-05-03 14:17:25,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:25,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833105620] [2021-05-03 14:17:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:25,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833105620] [2021-05-03 14:17:25,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964063153] [2021-05-03 14:17:25,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:25,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:17:25,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:25,545 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:17:25,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:26,392 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:17:26,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:17:26,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:17:27,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:17:27,444 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:17:27,445 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:17:27,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:17:30,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:17:30,881 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:17:30,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:17:30,882 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:17:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:30,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:30,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 14:17:30,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736338982] [2021-05-03 14:17:30,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 14:17:30,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:30,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 14:17:30,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:17:30,932 INFO L87 Difference]: Start difference. First operand 3101 states and 9186 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:34,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:34,933 INFO L93 Difference]: Finished difference Result 4434 states and 12923 transitions. [2021-05-03 14:17:34,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 14:17:34,934 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:17:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:34,940 INFO L225 Difference]: With dead ends: 4434 [2021-05-03 14:17:34,940 INFO L226 Difference]: Without dead ends: 4399 [2021-05-03 14:17:34,940 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 3089.3ms TimeCoverageRelationStatistics Valid=450, Invalid=3456, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 14:17:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4399 states. [2021-05-03 14:17:34,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4399 to 2998. [2021-05-03 14:17:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2997 states have (on average 2.960960960960961) internal successors, (8874), 2997 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 8874 transitions. [2021-05-03 14:17:34,977 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 8874 transitions. Word has length 22 [2021-05-03 14:17:34,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:34,977 INFO L480 AbstractCegarLoop]: Abstraction has 2998 states and 8874 transitions. [2021-05-03 14:17:34,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:34,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 8874 transitions. [2021-05-03 14:17:34,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:17:34,979 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:34,979 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:35,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64382 [2021-05-03 14:17:35,180 INFO L428 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:35,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:35,180 INFO L82 PathProgramCache]: Analyzing trace with hash -653046755, now seen corresponding path program 459 times [2021-05-03 14:17:35,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:35,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165443236] [2021-05-03 14:17:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:35,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165443236] [2021-05-03 14:17:35,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330049388] [2021-05-03 14:17:35,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:35,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:17:35,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:35,435 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:17:35,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:36,179 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:17:36,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:17:36,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:17:37,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:17:37,700 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:17:37,701 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:17:37,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:17:39,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:17:39,075 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:17:39,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:17:39,077 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:17:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:39,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:39,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 14:17:39,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294633912] [2021-05-03 14:17:39,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 14:17:39,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:39,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 14:17:39,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:17:39,185 INFO L87 Difference]: Start difference. First operand 2998 states and 8874 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:41,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:41,902 INFO L93 Difference]: Finished difference Result 3726 states and 10821 transitions. [2021-05-03 14:17:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 14:17:41,904 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:17:41,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:41,909 INFO L225 Difference]: With dead ends: 3726 [2021-05-03 14:17:41,910 INFO L226 Difference]: Without dead ends: 3716 [2021-05-03 14:17:41,910 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 2261.5ms TimeCoverageRelationStatistics Valid=355, Invalid=2725, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 14:17:41,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2021-05-03 14:17:41,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3003. [2021-05-03 14:17:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 2.9610259826782146) internal successors, (8889), 3002 states have internal predecessors, (8889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:41,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8889 transitions. [2021-05-03 14:17:41,954 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8889 transitions. Word has length 22 [2021-05-03 14:17:41,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:41,954 INFO L480 AbstractCegarLoop]: Abstraction has 3003 states and 8889 transitions. [2021-05-03 14:17:41,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:41,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8889 transitions. [2021-05-03 14:17:41,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:17:41,957 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:41,957 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:42,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65352 [2021-05-03 14:17:42,157 INFO L428 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:42,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:42,158 INFO L82 PathProgramCache]: Analyzing trace with hash -169872295, now seen corresponding path program 460 times [2021-05-03 14:17:42,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:42,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430657305] [2021-05-03 14:17:42,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:42,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430657305] [2021-05-03 14:17:42,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798331047] [2021-05-03 14:17:42,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:42,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:17:42,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:42,533 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:17:42,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:43,953 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:17:43,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:17:43,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:17:45,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:17:45,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:17:45,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:17:45,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:17:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:45,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:45,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:17:45,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825242797] [2021-05-03 14:17:45,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:17:45,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:45,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:17:45,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:17:45,641 INFO L87 Difference]: Start difference. First operand 3003 states and 8889 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:47,446 INFO L93 Difference]: Finished difference Result 3030 states and 8931 transitions. [2021-05-03 14:17:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:17:47,448 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:17:47,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:47,453 INFO L225 Difference]: With dead ends: 3030 [2021-05-03 14:17:47,453 INFO L226 Difference]: Without dead ends: 3012 [2021-05-03 14:17:47,453 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1411.2ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:17:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-05-03 14:17:47,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 3003. [2021-05-03 14:17:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 2.960359760159893) internal successors, (8887), 3002 states have internal predecessors, (8887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8887 transitions. [2021-05-03 14:17:47,494 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8887 transitions. Word has length 22 [2021-05-03 14:17:47,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:47,494 INFO L480 AbstractCegarLoop]: Abstraction has 3003 states and 8887 transitions. [2021-05-03 14:17:47,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:47,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8887 transitions. [2021-05-03 14:17:47,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:17:47,497 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:47,497 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:47,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65858 [2021-05-03 14:17:47,698 INFO L428 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:47,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:47,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1882629879, now seen corresponding path program 461 times [2021-05-03 14:17:47,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:47,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220517724] [2021-05-03 14:17:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:48,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220517724] [2021-05-03 14:17:48,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375920166] [2021-05-03 14:17:48,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:48,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:17:48,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:48,060 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:17:48,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:49,188 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:17:49,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:17:49,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:17:50,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:17:50,959 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:17:50,959 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:17:50,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:17:51,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:17:51,879 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:17:51,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:17:51,881 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:17:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:51,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:51,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 14:17:51,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531574747] [2021-05-03 14:17:51,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 14:17:51,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:51,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 14:17:51,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:17:51,976 INFO L87 Difference]: Start difference. First operand 3003 states and 8887 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:53,915 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-05-03 14:17:55,058 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-05-03 14:17:56,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:56,111 INFO L93 Difference]: Finished difference Result 3530 states and 10303 transitions. [2021-05-03 14:17:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 14:17:56,113 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:17:56,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:56,118 INFO L225 Difference]: With dead ends: 3530 [2021-05-03 14:17:56,118 INFO L226 Difference]: Without dead ends: 3520 [2021-05-03 14:17:56,119 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 3675.8ms TimeCoverageRelationStatistics Valid=421, Invalid=3001, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 14:17:56,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3520 states. [2021-05-03 14:17:56,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3520 to 3073. [2021-05-03 14:17:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3073 states, 3072 states have (on average 2.9619140625) internal successors, (9099), 3072 states have internal predecessors, (9099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3073 states to 3073 states and 9099 transitions. [2021-05-03 14:17:56,157 INFO L78 Accepts]: Start accepts. Automaton has 3073 states and 9099 transitions. Word has length 22 [2021-05-03 14:17:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:56,158 INFO L480 AbstractCegarLoop]: Abstraction has 3073 states and 9099 transitions. [2021-05-03 14:17:56,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3073 states and 9099 transitions. [2021-05-03 14:17:56,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:17:56,161 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:56,161 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:56,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66160 [2021-05-03 14:17:56,361 INFO L428 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:56,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:56,361 INFO L82 PathProgramCache]: Analyzing trace with hash 834965435, now seen corresponding path program 462 times [2021-05-03 14:17:56,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:56,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96026579] [2021-05-03 14:17:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:56,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96026579] [2021-05-03 14:17:56,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959717137] [2021-05-03 14:17:56,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:17:56,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:17:56,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:56,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:17:56,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:57,589 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:17:57,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:17:57,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:17:58,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:17:58,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:17:58,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:17:58,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:17:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:58,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:58,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:17:58,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118600976] [2021-05-03 14:17:58,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:17:58,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:58,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:17:58,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:17:58,731 INFO L87 Difference]: Start difference. First operand 3073 states and 9099 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:00,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:00,542 INFO L93 Difference]: Finished difference Result 3616 states and 10700 transitions. [2021-05-03 14:18:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:18:00,544 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:18:00,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:00,548 INFO L225 Difference]: With dead ends: 3616 [2021-05-03 14:18:00,548 INFO L226 Difference]: Without dead ends: 3600 [2021-05-03 14:18:00,548 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 958.1ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:18:00,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2021-05-03 14:18:00,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 3562. [2021-05-03 14:18:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3562 states, 3561 states have (on average 2.974726200505476) internal successors, (10593), 3561 states have internal predecessors, (10593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 10593 transitions. [2021-05-03 14:18:00,588 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 10593 transitions. Word has length 22 [2021-05-03 14:18:00,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:00,588 INFO L480 AbstractCegarLoop]: Abstraction has 3562 states and 10593 transitions. [2021-05-03 14:18:00,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:00,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 10593 transitions. [2021-05-03 14:18:00,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:18:00,591 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:00,591 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:00,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66591,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:00,792 INFO L428 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:00,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1693839965, now seen corresponding path program 463 times [2021-05-03 14:18:00,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:00,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203574231] [2021-05-03 14:18:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:01,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203574231] [2021-05-03 14:18:01,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567432486] [2021-05-03 14:18:01,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:01,070 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:18:01,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:01,847 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:18:01,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:18:01,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:18:02,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:18:02,942 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:18:02,943 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:18:02,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:18:03,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:03,776 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:18:03,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:18:03,777 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:18:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:03,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:03,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:18:03,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57408041] [2021-05-03 14:18:03,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:18:03,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:03,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:18:03,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:18:03,828 INFO L87 Difference]: Start difference. First operand 3562 states and 10593 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:07,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:07,546 INFO L93 Difference]: Finished difference Result 3947 states and 11563 transitions. [2021-05-03 14:18:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 14:18:07,548 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:18:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:07,553 INFO L225 Difference]: With dead ends: 3947 [2021-05-03 14:18:07,554 INFO L226 Difference]: Without dead ends: 3909 [2021-05-03 14:18:07,554 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 2348.7ms TimeCoverageRelationStatistics Valid=383, Invalid=3777, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 14:18:07,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-05-03 14:18:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 3568. [2021-05-03 14:18:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3568 states, 3567 states have (on average 2.976170451359686) internal successors, (10616), 3567 states have internal predecessors, (10616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3568 states to 3568 states and 10616 transitions. [2021-05-03 14:18:07,600 INFO L78 Accepts]: Start accepts. Automaton has 3568 states and 10616 transitions. Word has length 22 [2021-05-03 14:18:07,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:07,600 INFO L480 AbstractCegarLoop]: Abstraction has 3568 states and 10616 transitions. [2021-05-03 14:18:07,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:07,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3568 states and 10616 transitions. [2021-05-03 14:18:07,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:18:07,604 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:07,604 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:07,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66828 [2021-05-03 14:18:07,805 INFO L428 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:07,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:07,805 INFO L82 PathProgramCache]: Analyzing trace with hash -890514023, now seen corresponding path program 464 times [2021-05-03 14:18:07,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:07,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304519543] [2021-05-03 14:18:07,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:18:08,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304519543] [2021-05-03 14:18:08,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187080136] [2021-05-03 14:18:08,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:08,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:18:08,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:08,163 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:18:08,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:09,280 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:18:09,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:18:09,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:18:10,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:18:11,341 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:18:11,343 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:18:11,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:18:12,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:12,777 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:18:12,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:18:12,779 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:18:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:12,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:12,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-05-03 14:18:12,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112897803] [2021-05-03 14:18:12,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:18:12,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:12,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:18:12,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:18:12,886 INFO L87 Difference]: Start difference. First operand 3568 states and 10616 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:16,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:16,413 INFO L93 Difference]: Finished difference Result 4191 states and 12335 transitions. [2021-05-03 14:18:16,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 14:18:16,415 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:18:16,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:16,421 INFO L225 Difference]: With dead ends: 4191 [2021-05-03 14:18:16,422 INFO L226 Difference]: Without dead ends: 4181 [2021-05-03 14:18:16,422 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2333.4ms TimeCoverageRelationStatistics Valid=262, Invalid=2708, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 14:18:16,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-05-03 14:18:16,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3738. [2021-05-03 14:18:16,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3737 states have (on average 2.98019801980198) internal successors, (11137), 3737 states have internal predecessors, (11137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:16,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 11137 transitions. [2021-05-03 14:18:16,479 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 11137 transitions. Word has length 22 [2021-05-03 14:18:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:16,479 INFO L480 AbstractCegarLoop]: Abstraction has 3738 states and 11137 transitions. [2021-05-03 14:18:16,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 11137 transitions. [2021-05-03 14:18:16,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:18:16,483 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:16,483 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:16,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67185,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:16,684 INFO L428 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:16,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:16,684 INFO L82 PathProgramCache]: Analyzing trace with hash 598890973, now seen corresponding path program 465 times [2021-05-03 14:18:16,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:16,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684839690] [2021-05-03 14:18:16,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:16,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684839690] [2021-05-03 14:18:16,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54517139] [2021-05-03 14:18:16,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:17,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:18:17,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:17,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:18:17,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:18,254 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:18:18,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:18:18,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:18:18,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:18:19,318 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:18:19,318 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:18:19,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:18:20,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:20,179 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:18:20,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:18:20,181 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:18:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:20,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:20,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:18:20,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704111615] [2021-05-03 14:18:20,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:18:20,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:20,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:18:20,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:18:20,280 INFO L87 Difference]: Start difference. First operand 3738 states and 11137 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:23,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:23,801 INFO L93 Difference]: Finished difference Result 4542 states and 13216 transitions. [2021-05-03 14:18:23,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 14:18:23,802 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:18:23,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:23,807 INFO L225 Difference]: With dead ends: 4542 [2021-05-03 14:18:23,807 INFO L226 Difference]: Without dead ends: 4508 [2021-05-03 14:18:23,808 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2743.3ms TimeCoverageRelationStatistics Valid=405, Invalid=3885, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 14:18:23,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2021-05-03 14:18:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 3743. [2021-05-03 14:18:23,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3743 states, 3742 states have (on average 2.980224478888295) internal successors, (11152), 3742 states have internal predecessors, (11152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 11152 transitions. [2021-05-03 14:18:23,848 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 11152 transitions. Word has length 22 [2021-05-03 14:18:23,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:23,848 INFO L480 AbstractCegarLoop]: Abstraction has 3743 states and 11152 transitions. [2021-05-03 14:18:23,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 11152 transitions. [2021-05-03 14:18:23,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:18:23,851 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:23,851 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:24,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67834,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:24,052 INFO L428 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:24,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:24,052 INFO L82 PathProgramCache]: Analyzing trace with hash -474194407, now seen corresponding path program 466 times [2021-05-03 14:18:24,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:24,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607101104] [2021-05-03 14:18:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:18:24,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607101104] [2021-05-03 14:18:24,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3520567] [2021-05-03 14:18:24,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:24,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:18:24,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:24,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:18:24,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:25,031 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:18:25,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:18:25,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:18:25,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:18:26,349 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:18:26,349 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:18:26,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:18:27,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:27,775 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:18:27,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:18:27,777 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:18:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:27,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:27,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-05-03 14:18:27,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131674647] [2021-05-03 14:18:27,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 14:18:27,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:27,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 14:18:27,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:18:27,880 INFO L87 Difference]: Start difference. First operand 3743 states and 11152 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:30,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:30,983 INFO L93 Difference]: Finished difference Result 4115 states and 12062 transitions. [2021-05-03 14:18:30,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 14:18:30,984 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:18:30,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:30,990 INFO L225 Difference]: With dead ends: 4115 [2021-05-03 14:18:30,990 INFO L226 Difference]: Without dead ends: 4100 [2021-05-03 14:18:30,990 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 2375.8ms TimeCoverageRelationStatistics Valid=386, Invalid=3154, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 14:18:30,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2021-05-03 14:18:31,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 3823. [2021-05-03 14:18:31,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3822 states have (on average 2.980638409209838) internal successors, (11392), 3822 states have internal predecessors, (11392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:31,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 11392 transitions. [2021-05-03 14:18:31,035 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 11392 transitions. Word has length 22 [2021-05-03 14:18:31,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:31,035 INFO L480 AbstractCegarLoop]: Abstraction has 3823 states and 11392 transitions. [2021-05-03 14:18:31,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:31,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 11392 transitions. [2021-05-03 14:18:31,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:18:31,040 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:31,040 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:31,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68209 [2021-05-03 14:18:31,240 INFO L428 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:31,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:31,240 INFO L82 PathProgramCache]: Analyzing trace with hash 619897181, now seen corresponding path program 467 times [2021-05-03 14:18:31,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:31,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187013289] [2021-05-03 14:18:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:31,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187013289] [2021-05-03 14:18:31,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144219310] [2021-05-03 14:18:31,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:31,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:18:31,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:31,540 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:18:31,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:18:32,680 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:18:32,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:18:32,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-05-03 14:18:35,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:18:35,895 WARN L205 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-05-03 14:18:35,897 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-05-03 14:18:35,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-05-03 14:18:39,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 14:18:39,092 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 14:18:39,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:18:39,093 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-05-03 14:18:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:18:39,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:18:39,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-05-03 14:18:39,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033729188] [2021-05-03 14:18:39,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:18:39,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:18:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:18:39,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:18:39,154 INFO L87 Difference]: Start difference. First operand 3823 states and 11392 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:18:42,502 INFO L93 Difference]: Finished difference Result 4266 states and 12418 transitions. [2021-05-03 14:18:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 14:18:42,504 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:18:42,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:18:42,509 INFO L225 Difference]: With dead ends: 4266 [2021-05-03 14:18:42,509 INFO L226 Difference]: Without dead ends: 4241 [2021-05-03 14:18:42,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 3010.6ms TimeCoverageRelationStatistics Valid=550, Invalid=4280, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 14:18:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-05-03 14:18:42,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 3827. [2021-05-03 14:18:42,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 2.979874542603241) internal successors, (11401), 3826 states have internal predecessors, (11401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:42,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 11401 transitions. [2021-05-03 14:18:42,559 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 11401 transitions. Word has length 22 [2021-05-03 14:18:42,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:18:42,559 INFO L480 AbstractCegarLoop]: Abstraction has 3827 states and 11401 transitions. [2021-05-03 14:18:42,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:18:42,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 11401 transitions. [2021-05-03 14:18:42,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:18:42,563 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:18:42,563 INFO L551 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:18:42,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68703,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:42,764 INFO L428 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:18:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:18:42,764 INFO L82 PathProgramCache]: Analyzing trace with hash 176998041, now seen corresponding path program 468 times [2021-05-03 14:18:42,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:18:42,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661454601] [2021-05-03 14:18:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:18:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:18:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:18:43,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661454601] [2021-05-03 14:18:43,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694153245] [2021-05-03 14:18:43,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:43,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:18:43,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:18:43,115 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 14:18:43,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-05-03 14:18:43,240 WARN L222 SmtUtils]: Removed 2 from assertion stack [2021-05-03 14:18:43,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69843,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:18:43,441 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 14:18:43,444 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 14:18:43,445 INFO L202 PluginConnector]: Adding new model unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 02:18:43 BasicIcfg [2021-05-03 14:18:43,445 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 14:18:43,445 INFO L168 Benchmark]: Toolchain (without parser) took 854412.05 ms. Allocated memory was 341.8 MB in the beginning and 1.8 GB in the end (delta: 1.4 GB). Free memory was 320.9 MB in the beginning and 1.2 GB in the end (delta: -867.7 MB). Peak memory consumption was 579.3 MB. Max. memory is 16.0 GB. [2021-05-03 14:18:43,446 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 341.8 MB. Free memory was 322.0 MB in the beginning and 322.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:18:43,446 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.28 ms. Allocated memory is still 341.8 MB. Free memory was 320.8 MB in the beginning and 319.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:18:43,446 INFO L168 Benchmark]: Boogie Preprocessor took 16.20 ms. Allocated memory is still 341.8 MB. Free memory was 319.4 MB in the beginning and 318.4 MB in the end (delta: 914.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 14:18:43,446 INFO L168 Benchmark]: RCFGBuilder took 275.25 ms. Allocated memory is still 341.8 MB. Free memory was 318.4 MB in the beginning and 303.7 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-05-03 14:18:43,446 INFO L168 Benchmark]: TraceAbstraction took 854090.23 ms. Allocated memory was 341.8 MB in the beginning and 1.8 GB in the end (delta: 1.4 GB). Free memory was 303.3 MB in the beginning and 1.2 GB in the end (delta: -885.3 MB). Peak memory consumption was 560.4 MB. Max. memory is 16.0 GB. [2021-05-03 14:18:43,446 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 0.12 ms. Allocated memory is still 341.8 MB. Free memory was 322.0 MB in the beginning and 322.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.28 ms. Allocated memory is still 341.8 MB. Free memory was 320.8 MB in the beginning and 319.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.20 ms. Allocated memory is still 341.8 MB. Free memory was 319.4 MB in the beginning and 318.4 MB in the end (delta: 914.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 275.25 ms. Allocated memory is still 341.8 MB. Free memory was 318.4 MB in the beginning and 303.7 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 854090.23 ms. Allocated memory was 341.8 MB in the beginning and 1.8 GB in the end (delta: 1.4 GB). Free memory was 303.3 MB in the beginning and 1.2 GB in the end (delta: -885.3 MB). Peak memory consumption was 560.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 57). Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 14 for 16ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 853958.7ms, OverallIterations: 476, TraceHistogramMax: 8, EmptinessCheckTime: 713.9ms, AutomataDifference: 275782.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10417 SDtfs, 24087 SDslu, 92633 SDs, 0 SdLazy, 204849 SolverSat, 17634 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 87143.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18687 GetRequests, 6350 SyntacticMatches, 122 SemanticMatches, 12215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97456 ImplicationChecksByTransitivity, 230753.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5602occurred in iteration=314, InterpolantAutomatonStates: 10399, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9537.7ms AutomataMinimizationTime, 475 MinimizatonAttempts, 103794 StatesRemovedByMinimization, 473 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1413.9ms SsaConstructionTime, 4669.6ms SatisfiabilityAnalysisTime, 458485.2ms InterpolantComputationTime, 17969 NumberOfCodeBlocks, 17969 NumberOfCodeBlocksAsserted, 1880 NumberOfCheckSat, 17023 ConstructedInterpolants, 0 QuantifiedInterpolants, 167213 SizeOfPredicates, 733 NumberOfNonLiveVariables, 35866 ConjunctsInSsa, 12428 ConjunctsInUnsatCore, 946 InterpolantComputations, 4 PerfectInterpolantSequences, 4650/27626 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