/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:18:45,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:18:45,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:18:45,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:18:45,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:18:45,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:18:45,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:18:45,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:18:45,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:18:45,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:18:45,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:18:45,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:18:45,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:18:45,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:18:45,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:18:45,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:18:45,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:18:45,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:18:45,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:18:45,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:18:45,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:18:45,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:18:45,755 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:18:45,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:18:45,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:18:45,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:18:45,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:18:45,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:18:45,769 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 [2020-07-07 11:18:45,803 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:18:45,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:18:45,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:18:45,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:18:45,807 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:18:45,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:18:45,807 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:18:45,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:18:45,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:18:45,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:18:45,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:18:45,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:18:45,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:18:45,809 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:18:45,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:18:45,810 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:18:45,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:18:45,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:18:45,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:18:45,811 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:18:45,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:18:45,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:18:45,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:18:45,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:18:45,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:18:45,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:18:45,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:18:45,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:18:45,812 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:18:45,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:18:46,087 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:18:46,099 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:18:46,105 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:18:46,106 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:18:46,106 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:18:46,107 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-07 11:18:46,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e24b7e1b/855b99b0e6414e0e94ec96938b88630e/FLAG84ddf7bba [2020-07-07 11:18:46,608 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:18:46,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-07 11:18:46,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e24b7e1b/855b99b0e6414e0e94ec96938b88630e/FLAG84ddf7bba [2020-07-07 11:18:47,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e24b7e1b/855b99b0e6414e0e94ec96938b88630e [2020-07-07 11:18:47,020 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:18:47,022 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:18:47,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:18:47,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:18:47,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:18:47,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:18:47" (1/1) ... [2020-07-07 11:18:47,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@980e4e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:18:47, skipping insertion in model container [2020-07-07 11:18:47,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:18:47" (1/1) ... [2020-07-07 11:18:47,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:18:47,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:18:47,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:18:47,262 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:18:47,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:18:47,294 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:18:47,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:18:47 WrapperNode [2020-07-07 11:18:47,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:18:47,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:18:47,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:18:47,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:18:47,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:18:47" (1/1) ... [2020-07-07 11:18:47,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:18:47" (1/1) ... [2020-07-07 11:18:47,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:18:47" (1/1) ... [2020-07-07 11:18:47,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:18:47" (1/1) ... [2020-07-07 11:18:47,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:18:47" (1/1) ... [2020-07-07 11:18:47,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:18:47" (1/1) ... [2020-07-07 11:18:47,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:18:47" (1/1) ... [2020-07-07 11:18:47,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:18:47,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:18:47,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:18:47,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:18:47,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:18:47" (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 [2020-07-07 11:18:47,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:18:47,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:18:47,466 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-07 11:18:47,466 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:18:47,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:18:47,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:18:47,466 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-07 11:18:47,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:18:47,467 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:18:47,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 11:18:47,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:18:47,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:18:47,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:18:47,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:18:47,707 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:18:47,707 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 11:18:47,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:18:47 BoogieIcfgContainer [2020-07-07 11:18:47,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:18:47,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:18:47,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:18:47,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:18:47,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:18:47" (1/3) ... [2020-07-07 11:18:47,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c6b4af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:18:47, skipping insertion in model container [2020-07-07 11:18:47,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:18:47" (2/3) ... [2020-07-07 11:18:47,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c6b4af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:18:47, skipping insertion in model container [2020-07-07 11:18:47,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:18:47" (3/3) ... [2020-07-07 11:18:47,719 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-07-07 11:18:47,730 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:18:47,737 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:18:47,751 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:18:47,775 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:18:47,775 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:18:47,775 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:18:47,775 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:18:47,775 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:18:47,776 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:18:47,776 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:18:47,776 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:18:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-07 11:18:47,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-07 11:18:47,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:47,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:47,803 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:47,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:47,809 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-07-07 11:18:47,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:47,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270577817] [2020-07-07 11:18:47,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:48,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270577817] [2020-07-07 11:18:48,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:18:48,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:18:48,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082529769] [2020-07-07 11:18:48,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:18:48,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:48,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:18:48,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:18:48,025 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-07-07 11:18:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:48,123 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-07 11:18:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:18:48,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-07 11:18:48,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:48,135 INFO L225 Difference]: With dead ends: 42 [2020-07-07 11:18:48,135 INFO L226 Difference]: Without dead ends: 20 [2020-07-07 11:18:48,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:18:48,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-07 11:18:48,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-07 11:18:48,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-07 11:18:48,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-07 11:18:48,180 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-07-07 11:18:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:48,180 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-07 11:18:48,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:18:48,181 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-07 11:18:48,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-07 11:18:48,182 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:48,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:48,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:18:48,183 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:48,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-07-07 11:18:48,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:48,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990648311] [2020-07-07 11:18:48,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:48,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990648311] [2020-07-07 11:18:48,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:18:48,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:18:48,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957320211] [2020-07-07 11:18:48,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:18:48,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:48,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:18:48,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:18:48,344 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-07-07 11:18:48,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:48,427 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-07-07 11:18:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:18:48,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-07-07 11:18:48,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:48,429 INFO L225 Difference]: With dead ends: 34 [2020-07-07 11:18:48,429 INFO L226 Difference]: Without dead ends: 22 [2020-07-07 11:18:48,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:18:48,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-07 11:18:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-07 11:18:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 11:18:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-07 11:18:48,438 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-07-07 11:18:48,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:48,439 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-07 11:18:48,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:18:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-07 11:18:48,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-07 11:18:48,440 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:48,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:48,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:18:48,441 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:48,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-07-07 11:18:48,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:48,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579653853] [2020-07-07 11:18:48,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:48,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579653853] [2020-07-07 11:18:48,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204115825] [2020-07-07 11:18:48,511 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 [2020-07-07 11:18:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:48,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-07 11:18:48,570 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:48,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:48,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-07 11:18:48,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908127414] [2020-07-07 11:18:48,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:18:48,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:48,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:18:48,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:18:48,613 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-07-07 11:18:48,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:48,675 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-07-07 11:18:48,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:18:48,675 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-07 11:18:48,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:48,676 INFO L225 Difference]: With dead ends: 36 [2020-07-07 11:18:48,677 INFO L226 Difference]: Without dead ends: 24 [2020-07-07 11:18:48,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:18:48,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-07 11:18:48,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-07-07 11:18:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-07 11:18:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-07 11:18:48,683 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-07-07 11:18:48,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:48,684 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-07 11:18:48,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:18:48,684 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-07 11:18:48,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 11:18:48,685 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:48,685 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:48,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 11:18:48,900 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:48,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1739404943, now seen corresponding path program 2 times [2020-07-07 11:18:48,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:48,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283846200] [2020-07-07 11:18:48,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:48,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283846200] [2020-07-07 11:18:48,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530809970] [2020-07-07 11:18:48,986 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 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 [2020-07-07 11:18:49,047 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:18:49,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:18:49,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 11:18:49,051 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:49,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:49,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-07 11:18:49,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465849775] [2020-07-07 11:18:49,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:18:49,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:49,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:18:49,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:18:49,070 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-07-07 11:18:49,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:49,136 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-07-07 11:18:49,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:18:49,136 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-07-07 11:18:49,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:49,137 INFO L225 Difference]: With dead ends: 38 [2020-07-07 11:18:49,138 INFO L226 Difference]: Without dead ends: 26 [2020-07-07 11:18:49,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:18:49,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-07 11:18:49,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-07-07 11:18:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-07 11:18:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-07-07 11:18:49,144 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-07-07 11:18:49,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:49,144 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-07-07 11:18:49,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:18:49,145 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-07-07 11:18:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 11:18:49,145 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:49,146 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:49,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:18:49,360 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:49,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:49,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1328015311, now seen corresponding path program 3 times [2020-07-07 11:18:49,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:49,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355713248] [2020-07-07 11:18:49,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:49,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355713248] [2020-07-07 11:18:49,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303944330] [2020-07-07 11:18:49,478 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 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 [2020-07-07 11:18:49,532 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 11:18:49,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:18:49,533 INFO L264 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-07 11:18:49,535 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:49,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:49,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-07 11:18:49,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690365026] [2020-07-07 11:18:49,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:18:49,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:49,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:18:49,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:18:49,561 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-07-07 11:18:49,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:49,623 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-07-07 11:18:49,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:18:49,624 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-07-07 11:18:49,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:49,624 INFO L225 Difference]: With dead ends: 40 [2020-07-07 11:18:49,625 INFO L226 Difference]: Without dead ends: 28 [2020-07-07 11:18:49,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:18:49,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-07 11:18:49,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-07 11:18:49,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 11:18:49,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-07 11:18:49,630 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-07-07 11:18:49,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:49,631 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-07 11:18:49,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:18:49,631 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-07 11:18:49,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 11:18:49,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:49,632 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:49,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:18:49,833 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:49,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:49,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 4 times [2020-07-07 11:18:49,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:49,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175839629] [2020-07-07 11:18:49,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:49,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175839629] [2020-07-07 11:18:49,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637838047] [2020-07-07 11:18:49,941 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 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 [2020-07-07 11:18:49,989 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:18:49,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:18:49,990 INFO L264 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:18:49,992 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:50,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:50,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-07-07 11:18:50,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169783866] [2020-07-07 11:18:50,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:18:50,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:50,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:18:50,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:18:50,008 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-07-07 11:18:50,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:50,058 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-07-07 11:18:50,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:18:50,059 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-07 11:18:50,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:50,059 INFO L225 Difference]: With dead ends: 42 [2020-07-07 11:18:50,060 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 11:18:50,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:18:50,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 11:18:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-07-07 11:18:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-07 11:18:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-07-07 11:18:50,066 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-07-07 11:18:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:50,066 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-07-07 11:18:50,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:18:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-07-07 11:18:50,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 11:18:50,067 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:50,067 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:50,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:18:50,281 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:50,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:50,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1787714037, now seen corresponding path program 5 times [2020-07-07 11:18:50,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:50,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912202567] [2020-07-07 11:18:50,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:50,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912202567] [2020-07-07 11:18:50,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803834194] [2020-07-07 11:18:50,382 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 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 [2020-07-07 11:18:50,460 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-07 11:18:50,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:18:50,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 11:18:50,464 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:50,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:50,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-07-07 11:18:50,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930053031] [2020-07-07 11:18:50,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:18:50,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:50,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:18:50,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:18:50,496 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 10 states. [2020-07-07 11:18:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:50,572 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-07-07 11:18:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:18:50,573 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-07 11:18:50,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:50,574 INFO L225 Difference]: With dead ends: 44 [2020-07-07 11:18:50,574 INFO L226 Difference]: Without dead ends: 32 [2020-07-07 11:18:50,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:18:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-07 11:18:50,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-07-07 11:18:50,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-07 11:18:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-07-07 11:18:50,583 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-07-07 11:18:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:50,584 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-07-07 11:18:50,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:18:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-07-07 11:18:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-07 11:18:50,587 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:50,587 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:50,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-07 11:18:50,801 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:50,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2147351063, now seen corresponding path program 6 times [2020-07-07 11:18:50,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:50,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704337432] [2020-07-07 11:18:50,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:50,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:50,955 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:50,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704337432] [2020-07-07 11:18:50,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525261758] [2020-07-07 11:18:50,955 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-07-07 11:18:51,055 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-07 11:18:51,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:18:51,057 INFO L264 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:18:51,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:51,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:51,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-07-07 11:18:51,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022648938] [2020-07-07 11:18:51,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:18:51,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:51,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:18:51,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:18:51,083 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 11 states. [2020-07-07 11:18:51,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:51,140 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-07-07 11:18:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:18:51,140 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-07-07 11:18:51,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:51,141 INFO L225 Difference]: With dead ends: 46 [2020-07-07 11:18:51,141 INFO L226 Difference]: Without dead ends: 34 [2020-07-07 11:18:51,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:18:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-07 11:18:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-07 11:18:51,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 11:18:51,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-07 11:18:51,147 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-07-07 11:18:51,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:51,147 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-07 11:18:51,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:18:51,147 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-07 11:18:51,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-07 11:18:51,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:51,148 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:51,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:18:51,358 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:51,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:51,359 INFO L82 PathProgramCache]: Analyzing trace with hash -133817927, now seen corresponding path program 7 times [2020-07-07 11:18:51,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:51,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144677531] [2020-07-07 11:18:51,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:51,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144677531] [2020-07-07 11:18:51,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032042058] [2020-07-07 11:18:51,495 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-07-07 11:18:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:51,544 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-07 11:18:51,546 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:51,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:51,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-07-07 11:18:51,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245248772] [2020-07-07 11:18:51,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 11:18:51,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:51,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 11:18:51,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:18:51,569 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-07 11:18:51,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:51,641 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-07-07 11:18:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:18:51,641 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-07-07 11:18:51,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:51,642 INFO L225 Difference]: With dead ends: 48 [2020-07-07 11:18:51,642 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 11:18:51,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:18:51,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 11:18:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-07 11:18:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-07 11:18:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-07-07 11:18:51,648 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-07-07 11:18:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:51,648 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-07-07 11:18:51,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 11:18:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-07-07 11:18:51,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 11:18:51,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:51,649 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:51,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:18:51,860 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:51,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:51,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1903896357, now seen corresponding path program 8 times [2020-07-07 11:18:51,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:51,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787683165] [2020-07-07 11:18:51,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:51,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787683165] [2020-07-07 11:18:51,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544280896] [2020-07-07 11:18:51,988 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 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 [2020-07-07 11:18:52,035 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:18:52,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:18:52,036 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 11:18:52,038 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:52,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:52,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-07-07 11:18:52,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989871463] [2020-07-07 11:18:52,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:18:52,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:52,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:18:52,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:18:52,062 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-07-07 11:18:52,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:52,139 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-07-07 11:18:52,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:18:52,139 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-07-07 11:18:52,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:52,140 INFO L225 Difference]: With dead ends: 50 [2020-07-07 11:18:52,140 INFO L226 Difference]: Without dead ends: 38 [2020-07-07 11:18:52,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:18:52,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-07 11:18:52,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-07-07 11:18:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-07 11:18:52,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-07-07 11:18:52,146 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-07-07 11:18:52,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:52,146 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-07-07 11:18:52,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:18:52,146 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-07-07 11:18:52,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-07 11:18:52,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:52,147 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:52,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-07 11:18:52,357 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:52,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:52,358 INFO L82 PathProgramCache]: Analyzing trace with hash -2142218371, now seen corresponding path program 9 times [2020-07-07 11:18:52,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:52,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404830843] [2020-07-07 11:18:52,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:52,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404830843] [2020-07-07 11:18:52,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909352743] [2020-07-07 11:18:52,494 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 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 [2020-07-07 11:18:52,750 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-07-07 11:18:52,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:18:52,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-07 11:18:52,755 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:52,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:52,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-07-07 11:18:52,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463364626] [2020-07-07 11:18:52,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 11:18:52,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:52,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 11:18:52,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:18:52,781 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2020-07-07 11:18:52,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:52,879 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-07-07 11:18:52,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:18:52,879 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-07-07 11:18:52,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:52,880 INFO L225 Difference]: With dead ends: 52 [2020-07-07 11:18:52,880 INFO L226 Difference]: Without dead ends: 40 [2020-07-07 11:18:52,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:18:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-07 11:18:52,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-07 11:18:52,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 11:18:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-07 11:18:52,887 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-07-07 11:18:52,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:52,887 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-07 11:18:52,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 11:18:52,887 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-07 11:18:52,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-07 11:18:52,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:52,888 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:53,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:18:53,092 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:53,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:53,093 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 10 times [2020-07-07 11:18:53,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:53,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902395656] [2020-07-07 11:18:53,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:53,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902395656] [2020-07-07 11:18:53,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331733551] [2020-07-07 11:18:53,216 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 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 [2020-07-07 11:18:53,269 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:18:53,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:18:53,270 INFO L264 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:18:53,272 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:53,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:53,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-07-07 11:18:53,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356686356] [2020-07-07 11:18:53,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 11:18:53,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:53,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 11:18:53,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:18:53,303 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-07-07 11:18:53,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:53,402 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-07-07 11:18:53,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 11:18:53,403 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-07-07 11:18:53,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:53,404 INFO L225 Difference]: With dead ends: 54 [2020-07-07 11:18:53,404 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 11:18:53,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:18:53,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 11:18:53,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-07 11:18:53,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-07 11:18:53,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-07-07 11:18:53,412 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-07-07 11:18:53,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:53,412 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-07-07 11:18:53,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 11:18:53,412 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-07-07 11:18:53,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-07 11:18:53,417 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:53,417 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:53,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:18:53,630 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:53,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:53,631 INFO L82 PathProgramCache]: Analyzing trace with hash 972952385, now seen corresponding path program 11 times [2020-07-07 11:18:53,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:53,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273258408] [2020-07-07 11:18:53,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:53,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273258408] [2020-07-07 11:18:53,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934704079] [2020-07-07 11:18:53,778 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 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 [2020-07-07 11:18:54,076 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-07-07 11:18:54,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:18:54,079 INFO L264 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-07 11:18:54,081 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:54,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:54,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-07-07 11:18:54,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98970855] [2020-07-07 11:18:54,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 11:18:54,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:54,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 11:18:54,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:18:54,116 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2020-07-07 11:18:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:54,215 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-07-07 11:18:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:18:54,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-07-07 11:18:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:54,217 INFO L225 Difference]: With dead ends: 56 [2020-07-07 11:18:54,217 INFO L226 Difference]: Without dead ends: 44 [2020-07-07 11:18:54,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:18:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-07 11:18:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-07 11:18:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-07 11:18:54,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-07-07 11:18:54,223 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-07-07 11:18:54,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:54,224 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-07-07 11:18:54,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 11:18:54,224 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-07-07 11:18:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-07 11:18:54,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:54,225 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:54,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-07 11:18:54,433 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:54,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:54,434 INFO L82 PathProgramCache]: Analyzing trace with hash 845451363, now seen corresponding path program 12 times [2020-07-07 11:18:54,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:54,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611730469] [2020-07-07 11:18:54,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:54,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611730469] [2020-07-07 11:18:54,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784285746] [2020-07-07 11:18:54,594 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-07-07 11:18:55,217 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-07-07 11:18:55,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:18:55,221 INFO L264 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-07 11:18:55,222 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:55,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:55,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2020-07-07 11:18:55,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005088551] [2020-07-07 11:18:55,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 11:18:55,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:55,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 11:18:55,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:18:55,243 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 17 states. [2020-07-07 11:18:55,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:55,340 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-07-07 11:18:55,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 11:18:55,340 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-07-07 11:18:55,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:55,342 INFO L225 Difference]: With dead ends: 58 [2020-07-07 11:18:55,342 INFO L226 Difference]: Without dead ends: 46 [2020-07-07 11:18:55,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:18:55,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-07 11:18:55,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-07 11:18:55,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 11:18:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-07 11:18:55,348 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-07-07 11:18:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:55,348 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-07 11:18:55,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 11:18:55,348 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-07 11:18:55,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-07 11:18:55,349 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:55,349 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:55,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-07 11:18:55,562 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:55,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:55,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1423946491, now seen corresponding path program 13 times [2020-07-07 11:18:55,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:55,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920118391] [2020-07-07 11:18:55,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:55,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920118391] [2020-07-07 11:18:55,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141100797] [2020-07-07 11:18:55,730 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-07-07 11:18:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:55,796 INFO L264 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-07 11:18:55,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:55,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:55,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2020-07-07 11:18:55,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685462300] [2020-07-07 11:18:55,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 11:18:55,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:55,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 11:18:55,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:18:55,833 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 18 states. [2020-07-07 11:18:55,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:55,965 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-07-07 11:18:55,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 11:18:55,965 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-07-07 11:18:55,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:55,966 INFO L225 Difference]: With dead ends: 60 [2020-07-07 11:18:55,966 INFO L226 Difference]: Without dead ends: 48 [2020-07-07 11:18:55,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:18:55,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-07 11:18:55,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-07-07 11:18:55,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-07 11:18:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-07-07 11:18:55,977 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-07-07 11:18:55,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:55,978 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-07-07 11:18:55,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 11:18:55,978 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-07-07 11:18:55,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-07 11:18:55,980 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:55,981 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:56,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-07 11:18:56,181 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:56,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:56,182 INFO L82 PathProgramCache]: Analyzing trace with hash -471897817, now seen corresponding path program 14 times [2020-07-07 11:18:56,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:56,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541446617] [2020-07-07 11:18:56,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:56,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541446617] [2020-07-07 11:18:56,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492227958] [2020-07-07 11:18:56,362 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 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 [2020-07-07 11:18:56,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:18:56,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:18:56,410 INFO L264 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-07 11:18:56,412 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:56,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:56,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-07-07 11:18:56,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439091405] [2020-07-07 11:18:56,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 11:18:56,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:56,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 11:18:56,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:18:56,430 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 19 states. [2020-07-07 11:18:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:56,553 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-07-07 11:18:56,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 11:18:56,554 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-07-07 11:18:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:56,555 INFO L225 Difference]: With dead ends: 62 [2020-07-07 11:18:56,555 INFO L226 Difference]: Without dead ends: 50 [2020-07-07 11:18:56,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:18:56,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-07 11:18:56,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-07-07 11:18:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-07 11:18:56,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-07-07 11:18:56,564 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-07-07 11:18:56,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:56,564 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-07-07 11:18:56,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 11:18:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-07-07 11:18:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-07 11:18:56,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:56,565 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:56,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:18:56,766 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:56,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:56,767 INFO L82 PathProgramCache]: Analyzing trace with hash -381156151, now seen corresponding path program 15 times [2020-07-07 11:18:56,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:56,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314182697] [2020-07-07 11:18:56,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:56,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314182697] [2020-07-07 11:18:56,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350719538] [2020-07-07 11:18:56,990 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 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 [2020-07-07 11:18:58,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-07-07 11:18:58,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:18:58,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-07 11:18:58,381 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:58,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:58,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2020-07-07 11:18:58,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797792046] [2020-07-07 11:18:58,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 11:18:58,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:58,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 11:18:58,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:18:58,403 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 20 states. [2020-07-07 11:18:58,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:58,538 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-07-07 11:18:58,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 11:18:58,538 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-07-07 11:18:58,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:58,539 INFO L225 Difference]: With dead ends: 64 [2020-07-07 11:18:58,539 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 11:18:58,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:18:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 11:18:58,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-07-07 11:18:58,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 11:18:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-07 11:18:58,553 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-07-07 11:18:58,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:58,554 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-07 11:18:58,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 11:18:58,554 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-07 11:18:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-07 11:18:58,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:58,555 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:58,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-07 11:18:58,758 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:58,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:58,759 INFO L82 PathProgramCache]: Analyzing trace with hash 922238955, now seen corresponding path program 16 times [2020-07-07 11:18:58,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:58,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577606932] [2020-07-07 11:18:58,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:58,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577606932] [2020-07-07 11:18:58,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513725995] [2020-07-07 11:18:58,999 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 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 [2020-07-07 11:18:59,046 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:18:59,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:18:59,047 INFO L264 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-07 11:18:59,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:18:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:59,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:18:59,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2020-07-07 11:18:59,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607789755] [2020-07-07 11:18:59,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 11:18:59,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:18:59,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 11:18:59,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-07 11:18:59,069 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 21 states. [2020-07-07 11:18:59,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:18:59,176 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-07-07 11:18:59,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 11:18:59,176 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-07-07 11:18:59,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:18:59,177 INFO L225 Difference]: With dead ends: 66 [2020-07-07 11:18:59,177 INFO L226 Difference]: Without dead ends: 54 [2020-07-07 11:18:59,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-07 11:18:59,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-07 11:18:59,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-07-07 11:18:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-07 11:18:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-07-07 11:18:59,182 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-07-07 11:18:59,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:18:59,183 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-07-07 11:18:59,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 11:18:59,183 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-07-07 11:18:59,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-07 11:18:59,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:18:59,184 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:18:59,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-07 11:18:59,385 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:18:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:18:59,385 INFO L82 PathProgramCache]: Analyzing trace with hash -645514611, now seen corresponding path program 17 times [2020-07-07 11:18:59,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:18:59,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052815382] [2020-07-07 11:18:59,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:18:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:18:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:18:59,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052815382] [2020-07-07 11:18:59,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975730334] [2020-07-07 11:18:59,633 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 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 [2020-07-07 11:19:00,265 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-07-07 11:19:00,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:19:00,271 INFO L264 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-07 11:19:00,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:19:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:19:00,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:19:00,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2020-07-07 11:19:00,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631418204] [2020-07-07 11:19:00,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 11:19:00,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:19:00,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 11:19:00,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:19:00,300 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 22 states. [2020-07-07 11:19:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:19:00,386 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-07-07 11:19:00,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 11:19:00,387 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-07-07 11:19:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:19:00,387 INFO L225 Difference]: With dead ends: 68 [2020-07-07 11:19:00,388 INFO L226 Difference]: Without dead ends: 56 [2020-07-07 11:19:00,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:19:00,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-07 11:19:00,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-07-07 11:19:00,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-07 11:19:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-07-07 11:19:00,392 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-07-07 11:19:00,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:19:00,393 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-07-07 11:19:00,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 11:19:00,394 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-07-07 11:19:00,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-07 11:19:00,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:19:00,394 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:19:00,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:19:00,607 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:19:00,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:19:00,608 INFO L82 PathProgramCache]: Analyzing trace with hash 276829359, now seen corresponding path program 18 times [2020-07-07 11:19:00,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:19:00,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518260306] [2020-07-07 11:19:00,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:19:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:19:00,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518260306] [2020-07-07 11:19:00,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383997486] [2020-07-07 11:19:00,907 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:19:05,547 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-07-07 11:19:05,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:19:05,587 INFO L264 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-07 11:19:05,588 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:19:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:19:05,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:19:05,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2020-07-07 11:19:05,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178581812] [2020-07-07 11:19:05,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-07 11:19:05,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:19:05,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-07 11:19:05,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-07 11:19:05,609 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 23 states. [2020-07-07 11:19:05,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:19:05,724 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-07-07 11:19:05,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 11:19:05,725 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-07-07 11:19:05,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:19:05,725 INFO L225 Difference]: With dead ends: 70 [2020-07-07 11:19:05,726 INFO L226 Difference]: Without dead ends: 58 [2020-07-07 11:19:05,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-07 11:19:05,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-07 11:19:05,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-07-07 11:19:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:19:05,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-07 11:19:05,731 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-07-07 11:19:05,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:19:05,731 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-07 11:19:05,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-07 11:19:05,731 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-07 11:19:05,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-07 11:19:05,732 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:19:05,732 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:19:05,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:19:05,933 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:19:05,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:19:05,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1886121553, now seen corresponding path program 19 times [2020-07-07 11:19:05,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:19:05,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708093808] [2020-07-07 11:19:05,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:19:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:19:06,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708093808] [2020-07-07 11:19:06,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485442388] [2020-07-07 11:19:06,225 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-07-07 11:19:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:06,281 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-07 11:19:06,282 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:19:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:19:06,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:19:06,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2020-07-07 11:19:06,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613149579] [2020-07-07 11:19:06,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 11:19:06,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:19:06,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 11:19:06,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:19:06,302 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 24 states. [2020-07-07 11:19:06,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:19:06,410 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-07-07 11:19:06,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-07 11:19:06,410 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-07-07 11:19:06,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:19:06,411 INFO L225 Difference]: With dead ends: 71 [2020-07-07 11:19:06,411 INFO L226 Difference]: Without dead ends: 59 [2020-07-07 11:19:06,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:19:06,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-07 11:19:06,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-07 11:19:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-07 11:19:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-07-07 11:19:06,417 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-07-07 11:19:06,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:19:06,417 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-07-07 11:19:06,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 11:19:06,418 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-07-07 11:19:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-07 11:19:06,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:19:06,418 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:19:06,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:19:06,628 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:19:06,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:19:06,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 20 times [2020-07-07 11:19:06,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:19:06,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012431283] [2020-07-07 11:19:06,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:19:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:19:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:19:06,838 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:19:06,838 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:19:06,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-07 11:19:06,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:19:06 BoogieIcfgContainer [2020-07-07 11:19:06,880 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:19:06,882 INFO L168 Benchmark]: Toolchain (without parser) took 19859.99 ms. Allocated memory was 137.9 MB in the beginning and 314.6 MB in the end (delta: 176.7 MB). Free memory was 102.6 MB in the beginning and 250.3 MB in the end (delta: -147.7 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:06,882 INFO L168 Benchmark]: CDTParser took 1.37 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:19:06,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.91 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 92.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:06,884 INFO L168 Benchmark]: Boogie Preprocessor took 115.54 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 92.0 MB in the beginning and 179.0 MB in the end (delta: -87.0 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:06,884 INFO L168 Benchmark]: RCFGBuilder took 301.23 ms. Allocated memory is still 201.3 MB. Free memory was 178.6 MB in the beginning and 163.6 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:06,885 INFO L168 Benchmark]: TraceAbstraction took 19166.95 ms. Allocated memory was 201.3 MB in the beginning and 314.6 MB in the end (delta: 113.2 MB). Free memory was 162.9 MB in the beginning and 250.3 MB in the end (delta: -87.4 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:06,887 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.37 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.91 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 92.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.54 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 92.0 MB in the beginning and 179.0 MB in the end (delta: -87.0 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 301.23 ms. Allocated memory is still 201.3 MB. Free memory was 178.6 MB in the beginning and 163.6 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19166.95 ms. Allocated memory was 201.3 MB in the beginning and 314.6 MB in the end (delta: 113.2 MB). Free memory was 162.9 MB in the beginning and 250.3 MB in the end (delta: -87.4 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 VAL [ad1={2:0}, j=0] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=1] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=2] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=3] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=4] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=5] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=6] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=7] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=8] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=9] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=10] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=11] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=12] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=13] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=14] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=15] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=16] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=17] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=18] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=19] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=20] [L17] COND FALSE !(j<20) VAL [ad1={2:0}, j=20] [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) VAL [\read(*pa)=0, ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) VAL [\old(b)=10, ad1={2:0}] [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) VAL [ad1={2:0}, ad2={2:0}, check(ad1, i)=0, i=10, j=20, pa={2:0}] [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() VAL [ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 19.0s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 365 SDtfs, 252 SDslu, 2032 SDs, 0 SdLazy, 1389 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1039 GetRequests, 789 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 8.4s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 1537 NumberOfCodeBlocks, 1537 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1439 ConstructedInterpolants, 0 QuantifiedInterpolants, 131957 SizeOfPredicates, 19 NumberOfNonLiveVariables, 3097 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 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 proved your program to be incorrect! Received shutdown request...