/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:08:51,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:08:51,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:08:51,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 22:08:51,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:08:51,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:08:51,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:08:51,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:08:51,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:08:51,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:08:51,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:08:51,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:08:51,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:08:51,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:08:51,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:08:51,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:08:51,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:08:51,555 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:08:51,577 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:08:51,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:08:51,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:08:51,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:08:51,580 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:08:51,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:08:51,581 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:08:51,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:08:51,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:08:51,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:08:51,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:08:51,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:08:51,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:08:51,583 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:08:51,583 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:08:51,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:08:51,584 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:08:51,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:08:51,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:08:51,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:08:51,584 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:08:51,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:08:51,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:08:51,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:08:51,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:08:51,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:08:51,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:08:51,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:08:51,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:08:51,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:08:51,845 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:08:51,861 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:08:51,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:08:51,867 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:08:51,867 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:08:51,868 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2019-11-23 22:08:51,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d87ae8b45/474dd39756304e3498ff577de93efdb6/FLAG2782cda4c [2019-11-23 22:08:52,409 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:08:52,409 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2019-11-23 22:08:52,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d87ae8b45/474dd39756304e3498ff577de93efdb6/FLAG2782cda4c [2019-11-23 22:08:52,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d87ae8b45/474dd39756304e3498ff577de93efdb6 [2019-11-23 22:08:52,809 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:08:52,810 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:08:52,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:08:52,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:08:52,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:08:52,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:08:52" (1/1) ... [2019-11-23 22:08:52,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@453ffcac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:52, skipping insertion in model container [2019-11-23 22:08:52,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:08:52" (1/1) ... [2019-11-23 22:08:52,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:08:52,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:08:53,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:08:53,031 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:08:53,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:08:53,075 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:08:53,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53 WrapperNode [2019-11-23 22:08:53,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:08:53,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:08:53,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:08:53,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:08:53,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:08:53,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:08:53,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:08:53,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:08:53,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (1/1) ... [2019-11-23 22:08:53,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:08:53,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:08:53,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:08:53,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:08:53,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (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 [2019-11-23 22:08:53,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:08:53,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:08:53,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:08:53,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:08:53,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:08:53,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:08:55,558 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:08:55,558 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 22:08:55,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:08:55 BoogieIcfgContainer [2019-11-23 22:08:55,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:08:55,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:08:55,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:08:55,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:08:55,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:08:52" (1/3) ... [2019-11-23 22:08:55,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e273186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:08:55, skipping insertion in model container [2019-11-23 22:08:55,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:53" (2/3) ... [2019-11-23 22:08:55,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e273186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:08:55, skipping insertion in model container [2019-11-23 22:08:55,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:08:55" (3/3) ... [2019-11-23 22:08:55,570 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2019-11-23 22:08:55,580 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:08:55,587 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-23 22:08:55,599 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-23 22:08:55,623 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:08:55,623 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:08:55,624 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:08:55,624 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:08:55,624 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:08:55,624 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:08:55,625 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:08:55,625 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:08:55,638 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-23 22:08:55,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:08:55,644 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:55,645 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:55,646 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:55,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:55,650 INFO L82 PathProgramCache]: Analyzing trace with hash 212117245, now seen corresponding path program 1 times [2019-11-23 22:08:55,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:55,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389613545] [2019-11-23 22:08:55,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:55,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389613545] [2019-11-23 22:08:55,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:08:55,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:08:55,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773607464] [2019-11-23 22:08:55,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:08:55,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:55,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:08:55,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:08:55,849 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-23 22:08:55,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:55,915 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2019-11-23 22:08:55,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:08:55,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 22:08:55,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:55,927 INFO L225 Difference]: With dead ends: 45 [2019-11-23 22:08:55,928 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:08:55,931 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:08:55,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:08:55,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2019-11-23 22:08:55,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:08:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-23 22:08:55,970 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 8 [2019-11-23 22:08:55,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:55,970 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-23 22:08:55,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:08:55,971 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-23 22:08:55,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:08:55,971 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:55,972 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:55,972 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:55,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:55,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1436002194, now seen corresponding path program 1 times [2019-11-23 22:08:55,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:55,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998015372] [2019-11-23 22:08:55,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:56,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998015372] [2019-11-23 22:08:56,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763467908] [2019-11-23 22:08:56,065 INFO L94 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 [2019-11-23 22:08:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:56,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:08:56,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:56,189 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-23 22:08:56,189 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:08:56,193 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:08:56,194 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:08:56,194 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-23 22:08:56,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:08:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:56,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:56,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2019-11-23 22:08:56,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044209090] [2019-11-23 22:08:56,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:08:56,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:56,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:08:56,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:08:56,270 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2019-11-23 22:08:56,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:56,437 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2019-11-23 22:08:56,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:08:56,438 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-23 22:08:56,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:56,440 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:08:56,440 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 22:08:56,441 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:08:56,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 22:08:56,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2019-11-23 22:08:56,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:08:56,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-23 22:08:56,449 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 10 [2019-11-23 22:08:56,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:56,449 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-23 22:08:56,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:08:56,450 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-23 22:08:56,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:08:56,451 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:56,451 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:56,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:56,658 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:56,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:56,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1806784366, now seen corresponding path program 1 times [2019-11-23 22:08:56,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:56,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087009874] [2019-11-23 22:08:56,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:08:56,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087009874] [2019-11-23 22:08:56,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533695580] [2019-11-23 22:08:56,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:56,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:08:56,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:56,919 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:08:56,919 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:08:56,935 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2019-11-23 22:08:56,936 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:08:57,004 INFO L567 ElimStorePlain]: treesize reduction 204, result has 9.7 percent of original size [2019-11-23 22:08:57,005 INFO L464 ElimStorePlain]: Eliminatee v_prenex_2 vanished before elimination [2019-11-23 22:08:57,005 INFO L464 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2019-11-23 22:08:57,005 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_6| vanished before elimination [2019-11-23 22:08:57,006 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 22:08:57,006 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:271, output treesize:22 [2019-11-23 22:08:57,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:08:57,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:08:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:57,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:57,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 10 [2019-11-23 22:08:57,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626496681] [2019-11-23 22:08:57,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:08:57,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:57,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:08:57,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:08:57,214 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 10 states. [2019-11-23 22:08:57,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:57,552 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-23 22:08:57,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:08:57,554 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-23 22:08:57,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:57,554 INFO L225 Difference]: With dead ends: 58 [2019-11-23 22:08:57,555 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 22:08:57,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:08:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 22:08:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2019-11-23 22:08:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:08:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-11-23 22:08:57,566 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 17 [2019-11-23 22:08:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:57,570 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-11-23 22:08:57,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:08:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-11-23 22:08:57,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 22:08:57,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:57,572 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:57,772 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:57,773 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:57,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:57,773 INFO L82 PathProgramCache]: Analyzing trace with hash 923080169, now seen corresponding path program 1 times [2019-11-23 22:08:57,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:57,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991005482] [2019-11-23 22:08:57,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:08:57,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991005482] [2019-11-23 22:08:57,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95103415] [2019-11-23 22:08:57,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:58,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:08:58,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:58,046 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:08:58,046 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:08:58,109 INFO L567 ElimStorePlain]: treesize reduction 196, result has 11.7 percent of original size [2019-11-23 22:08:58,113 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2019-11-23 22:08:58,113 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:08:58,124 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:08:58,124 INFO L464 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2019-11-23 22:08:58,125 INFO L464 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2019-11-23 22:08:58,126 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 22:08:58,126 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:271, output treesize:22 [2019-11-23 22:08:58,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:08:58,337 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:08:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:58,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:58,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 12 [2019-11-23 22:08:58,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729692160] [2019-11-23 22:08:58,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:08:58,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:58,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:08:58,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:08:58,375 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 12 states. [2019-11-23 22:08:58,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:58,856 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2019-11-23 22:08:58,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:08:58,858 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2019-11-23 22:08:58,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:58,859 INFO L225 Difference]: With dead ends: 74 [2019-11-23 22:08:58,859 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 22:08:58,860 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:08:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 22:08:58,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2019-11-23 22:08:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 22:08:58,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-11-23 22:08:58,876 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 24 [2019-11-23 22:08:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:58,876 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-11-23 22:08:58,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:08:58,877 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-11-23 22:08:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 22:08:58,877 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:58,878 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:59,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:59,084 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:59,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:59,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1800533019, now seen corresponding path program 1 times [2019-11-23 22:08:59,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:59,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076498996] [2019-11-23 22:08:59,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 22:08:59,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076498996] [2019-11-23 22:08:59,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843717780] [2019-11-23 22:08:59,258 INFO L94 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 [2019-11-23 22:08:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:59,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 22:08:59,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:59,339 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:08:59,340 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:08:59,398 INFO L567 ElimStorePlain]: treesize reduction 194, result has 11.8 percent of original size [2019-11-23 22:08:59,399 INFO L464 ElimStorePlain]: Eliminatee v_prenex_10 vanished before elimination [2019-11-23 22:08:59,406 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2019-11-23 22:08:59,406 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:08:59,421 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:08:59,421 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_8| vanished before elimination [2019-11-23 22:08:59,422 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 22:08:59,422 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:271, output treesize:22 [2019-11-23 22:08:59,537 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:08:59,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:08:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:59,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:59,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 14 [2019-11-23 22:08:59,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455827154] [2019-11-23 22:08:59,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:08:59,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:59,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:08:59,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:08:59,694 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 14 states. [2019-11-23 22:09:00,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:09:00,200 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2019-11-23 22:09:00,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:09:00,203 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-11-23 22:09:00,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:09:00,204 INFO L225 Difference]: With dead ends: 82 [2019-11-23 22:09:00,205 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 22:09:00,205 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:09:00,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 22:09:00,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2019-11-23 22:09:00,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 22:09:00,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-11-23 22:09:00,221 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 31 [2019-11-23 22:09:00,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:09:00,221 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-11-23 22:09:00,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:09:00,221 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-11-23 22:09:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 22:09:00,224 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:09:00,224 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:09:00,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:00,428 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:09:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:09:00,428 INFO L82 PathProgramCache]: Analyzing trace with hash 220495597, now seen corresponding path program 2 times [2019-11-23 22:09:00,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:09:00,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664413472] [2019-11-23 22:09:00,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:09:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 22:09:00,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664413472] [2019-11-23 22:09:00,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962642923] [2019-11-23 22:09:00,631 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:00,698 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:09:00,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:09:00,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 22:09:00,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:09:00,750 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2019-11-23 22:09:00,751 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:09:00,764 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:09:00,765 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 1 [2019-11-23 22:09:00,765 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:09:00,859 INFO L567 ElimStorePlain]: treesize reduction 204, result has 9.7 percent of original size [2019-11-23 22:09:00,860 INFO L464 ElimStorePlain]: Eliminatee v_prenex_13 vanished before elimination [2019-11-23 22:09:00,860 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_9| vanished before elimination [2019-11-23 22:09:00,860 INFO L464 ElimStorePlain]: Eliminatee v_prenex_15 vanished before elimination [2019-11-23 22:09:00,861 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 22:09:00,861 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:271, output treesize:22 [2019-11-23 22:09:01,029 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:09:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:01,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:09:01,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 15 [2019-11-23 22:09:01,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645003302] [2019-11-23 22:09:01,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:09:01,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:09:01,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:09:01,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:09:01,229 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 15 states. [2019-11-23 22:09:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:09:03,631 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2019-11-23 22:09:03,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:09:03,632 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2019-11-23 22:09:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:09:03,633 INFO L225 Difference]: With dead ends: 147 [2019-11-23 22:09:03,633 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 22:09:03,634 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:09:03,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 22:09:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 49. [2019-11-23 22:09:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 22:09:03,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2019-11-23 22:09:03,646 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 38 [2019-11-23 22:09:03,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:09:03,646 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2019-11-23 22:09:03,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:09:03,646 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2019-11-23 22:09:03,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 22:09:03,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:09:03,648 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:09:03,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:03,854 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:09:03,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:09:03,854 INFO L82 PathProgramCache]: Analyzing trace with hash -192032766, now seen corresponding path program 2 times [2019-11-23 22:09:03,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:09:03,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100537069] [2019-11-23 22:09:03,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:09:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 22:09:04,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100537069] [2019-11-23 22:09:04,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275269527] [2019-11-23 22:09:04,054 INFO L92 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 [2019-11-23 22:09:04,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:09:04,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:09:04,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:09:04,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:09:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 22:09:04,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:09:04,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 22:09:04,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716886615] [2019-11-23 22:09:04,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:09:04,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:09:04,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:09:04,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:09:04,150 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 10 states. [2019-11-23 22:09:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:09:04,373 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2019-11-23 22:09:04,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:09:04,377 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-11-23 22:09:04,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:09:04,378 INFO L225 Difference]: With dead ends: 105 [2019-11-23 22:09:04,378 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 22:09:04,378 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:09:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 22:09:04,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2019-11-23 22:09:04,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 22:09:04,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-11-23 22:09:04,397 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 40 [2019-11-23 22:09:04,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:09:04,397 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-11-23 22:09:04,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:09:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-11-23 22:09:04,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 22:09:04,398 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:09:04,399 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:09:04,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:04,609 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:09:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:09:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1482392828, now seen corresponding path program 3 times [2019-11-23 22:09:04,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:09:04,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149270660] [2019-11-23 22:09:04,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:09:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 22:09:04,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149270660] [2019-11-23 22:09:04,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792483738] [2019-11-23 22:09:04,755 INFO L92 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 [2019-11-23 22:09:05,000 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 22:09:05,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:09:05,004 WARN L253 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 71 conjunts are in the unsatisfiable core [2019-11-23 22:09:05,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:09:05,171 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2019-11-23 22:09:05,172 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:09:05,178 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:09:05,179 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 1 [2019-11-23 22:09:05,179 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:09:05,220 INFO L567 ElimStorePlain]: treesize reduction 203, result has 9.8 percent of original size [2019-11-23 22:09:05,220 INFO L464 ElimStorePlain]: Eliminatee v_prenex_18 vanished before elimination [2019-11-23 22:09:05,221 INFO L464 ElimStorePlain]: Eliminatee v_prenex_17 vanished before elimination [2019-11-23 22:09:05,221 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_10| vanished before elimination [2019-11-23 22:09:05,221 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:09:05,222 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:271, output treesize:22 [2019-11-23 22:09:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 22:09:05,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:09:05,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2019-11-23 22:09:05,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346275237] [2019-11-23 22:09:05,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:09:05,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:09:05,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:09:05,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:09:05,278 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 19 states. [2019-11-23 22:09:05,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:09:05,699 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2019-11-23 22:09:05,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:09:05,699 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2019-11-23 22:09:05,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:09:05,700 INFO L225 Difference]: With dead ends: 128 [2019-11-23 22:09:05,700 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 22:09:05,701 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:09:05,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 22:09:05,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2019-11-23 22:09:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 22:09:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2019-11-23 22:09:05,722 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 42 [2019-11-23 22:09:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:09:05,723 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2019-11-23 22:09:05,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:09:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2019-11-23 22:09:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 22:09:05,724 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:09:05,725 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:09:05,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:05,926 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:09:05,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:09:05,926 INFO L82 PathProgramCache]: Analyzing trace with hash -272863866, now seen corresponding path program 4 times [2019-11-23 22:09:05,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:09:05,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986636668] [2019-11-23 22:09:05,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:09:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 22:09:06,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986636668] [2019-11-23 22:09:06,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432974109] [2019-11-23 22:09:06,071 INFO L92 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 [2019-11-23 22:09:06,123 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:09:06,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:09:06,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:09:06,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:09:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 22:09:06,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:09:06,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:09:06,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203998722] [2019-11-23 22:09:06,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:09:06,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:09:06,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:09:06,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:09:06,156 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 12 states. [2019-11-23 22:09:06,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:09:06,531 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2019-11-23 22:09:06,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:09:06,532 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2019-11-23 22:09:06,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:09:06,533 INFO L225 Difference]: With dead ends: 133 [2019-11-23 22:09:06,533 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 22:09:06,535 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:09:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 22:09:06,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2019-11-23 22:09:06,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 22:09:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2019-11-23 22:09:06,548 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 44 [2019-11-23 22:09:06,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:09:06,548 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2019-11-23 22:09:06,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:09:06,549 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2019-11-23 22:09:06,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 22:09:06,549 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:09:06,550 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:09:06,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:06,762 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:09:06,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:09:06,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1851668600, now seen corresponding path program 5 times [2019-11-23 22:09:06,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:09:06,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655957614] [2019-11-23 22:09:06,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:09:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 22:09:06,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655957614] [2019-11-23 22:09:06,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258055530] [2019-11-23 22:09:06,939 INFO L92 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