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/loop-lit/gj2007.c.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:16:35,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:16:35,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:16:35,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:16:35,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:16:35,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:16:35,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:16:35,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:16:35,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:16:35,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:16:35,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:16:35,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:16:35,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:16:35,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:16:35,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:16:35,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:16:35,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:16:35,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:16:35,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:16:35,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:16:35,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:16:35,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:16:35,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:16:35,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:16:35,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:16:35,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:16:35,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:16:35,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:16:35,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 19:16:35,847 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:16:35,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:16:35,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:16:35,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:16:35,849 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:16:35,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:16:35,849 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:16:35,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:16:35,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:16:35,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:16:35,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:16:35,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:16:35,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:16:35,852 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:16:35,852 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:16:35,852 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:16:35,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:16:35,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:16:35,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:16:35,853 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:16:35,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:16:35,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:16:35,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:16:35,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:16:35,854 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:16:35,854 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:16:35,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:16:35,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:16:35,855 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:16:36,136 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:16:36,149 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:16:36,153 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:16:36,154 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:16:36,154 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:16:36,155 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2019-10-13 19:16:36,227 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0347dc9ef/345f1c3495e7406d9154ec4c65eaaacd/FLAG95480275d [2019-10-13 19:16:36,687 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:16:36,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2019-10-13 19:16:36,695 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0347dc9ef/345f1c3495e7406d9154ec4c65eaaacd/FLAG95480275d [2019-10-13 19:16:37,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0347dc9ef/345f1c3495e7406d9154ec4c65eaaacd [2019-10-13 19:16:37,075 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:16:37,076 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:16:37,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:16:37,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:16:37,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:16:37,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:37" (1/1) ... [2019-10-13 19:16:37,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74a76cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:37, skipping insertion in model container [2019-10-13 19:16:37,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:37" (1/1) ... [2019-10-13 19:16:37,092 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:16:37,115 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:16:37,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:16:37,298 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:16:37,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:16:37,427 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:16:37,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:37 WrapperNode [2019-10-13 19:16:37,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:16:37,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:16:37,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:16:37,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:16:37,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:37" (1/1) ... [2019-10-13 19:16:37,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:37" (1/1) ... [2019-10-13 19:16:37,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:37" (1/1) ... [2019-10-13 19:16:37,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:37" (1/1) ... [2019-10-13 19:16:37,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:37" (1/1) ... [2019-10-13 19:16:37,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:37" (1/1) ... [2019-10-13 19:16:37,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:37" (1/1) ... [2019-10-13 19:16:37,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:16:37,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:16:37,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:16:37,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:16:37,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:16:37,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:16:37,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:16:37,531 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:16:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:16:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:16:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:16:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:16:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:16:37,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:16:37,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:16:37,801 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:16:37,801 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 19:16:37,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:37 BoogieIcfgContainer [2019-10-13 19:16:37,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:16:37,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:16:37,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:16:37,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:16:37,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:16:37" (1/3) ... [2019-10-13 19:16:37,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25441f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:37, skipping insertion in model container [2019-10-13 19:16:37,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:37" (2/3) ... [2019-10-13 19:16:37,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25441f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:37, skipping insertion in model container [2019-10-13 19:16:37,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:37" (3/3) ... [2019-10-13 19:16:37,815 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2019-10-13 19:16:37,829 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:16:37,837 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:16:37,863 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:16:37,895 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:16:37,895 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:16:37,895 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:16:37,895 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:16:37,895 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:16:37,896 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:16:37,896 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:16:37,896 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:16:37,920 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-13 19:16:37,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 19:16:37,927 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:37,928 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:37,929 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:37,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:37,933 INFO L82 PathProgramCache]: Analyzing trace with hash -535062244, now seen corresponding path program 1 times [2019-10-13 19:16:37,939 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:37,939 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538095410] [2019-10-13 19:16:37,940 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:37,940 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:37,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:38,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538095410] [2019-10-13 19:16:38,122 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:16:38,122 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:16:38,122 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675607409] [2019-10-13 19:16:38,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:16:38,127 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:38,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:16:38,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:16:38,147 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2019-10-13 19:16:38,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:38,405 INFO L93 Difference]: Finished difference Result 76 states and 130 transitions. [2019-10-13 19:16:38,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:16:38,407 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-13 19:16:38,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:38,419 INFO L225 Difference]: With dead ends: 76 [2019-10-13 19:16:38,419 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 19:16:38,423 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:16:38,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 19:16:38,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-13 19:16:38,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 19:16:38,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2019-10-13 19:16:38,477 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 27 [2019-10-13 19:16:38,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:38,478 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2019-10-13 19:16:38,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:16:38,479 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2019-10-13 19:16:38,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 19:16:38,481 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:38,481 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:38,483 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:38,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:38,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1447563500, now seen corresponding path program 1 times [2019-10-13 19:16:38,484 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:38,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601826512] [2019-10-13 19:16:38,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:38,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:38,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:38,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601826512] [2019-10-13 19:16:38,705 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:16:38,705 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2019-10-13 19:16:38,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488545295] [2019-10-13 19:16:38,707 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:16:38,707 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:38,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:16:38,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:16:38,709 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 13 states. [2019-10-13 19:16:39,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:39,077 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-10-13 19:16:39,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:16:39,078 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2019-10-13 19:16:39,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:39,079 INFO L225 Difference]: With dead ends: 54 [2019-10-13 19:16:39,079 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 19:16:39,081 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2019-10-13 19:16:39,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 19:16:39,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-13 19:16:39,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 19:16:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-10-13 19:16:39,088 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2019-10-13 19:16:39,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:39,089 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-10-13 19:16:39,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:16:39,089 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-10-13 19:16:39,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-13 19:16:39,090 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:39,090 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:39,090 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:39,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:39,091 INFO L82 PathProgramCache]: Analyzing trace with hash -880735776, now seen corresponding path program 1 times [2019-10-13 19:16:39,091 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:39,091 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158700803] [2019-10-13 19:16:39,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:39,092 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:39,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:39,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158700803] [2019-10-13 19:16:39,143 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:16:39,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:16:39,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220636400] [2019-10-13 19:16:39,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:16:39,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:39,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:16:39,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:16:39,145 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 4 states. [2019-10-13 19:16:39,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:39,219 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-10-13 19:16:39,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:16:39,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-10-13 19:16:39,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:39,222 INFO L225 Difference]: With dead ends: 36 [2019-10-13 19:16:39,222 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 19:16:39,223 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:16:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 19:16:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-13 19:16:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 19:16:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-10-13 19:16:39,234 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2019-10-13 19:16:39,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:39,234 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-10-13 19:16:39,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:16:39,235 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-10-13 19:16:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 19:16:39,236 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:39,236 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:39,236 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:39,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:39,237 INFO L82 PathProgramCache]: Analyzing trace with hash -286061766, now seen corresponding path program 1 times [2019-10-13 19:16:39,237 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:39,237 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802222461] [2019-10-13 19:16:39,238 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:39,238 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:39,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:39,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802222461] [2019-10-13 19:16:39,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534429205] [2019-10-13 19:16:39,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:39,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 19:16:39,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:39,545 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:16:39,545 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2019-10-13 19:16:39,545 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630718030] [2019-10-13 19:16:39,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 19:16:39,546 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:39,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 19:16:39,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:16:39,547 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 15 states. [2019-10-13 19:16:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:39,924 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2019-10-13 19:16:39,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 19:16:39,925 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2019-10-13 19:16:39,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:39,926 INFO L225 Difference]: With dead ends: 42 [2019-10-13 19:16:39,938 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 19:16:39,939 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2019-10-13 19:16:39,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 19:16:39,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-13 19:16:39,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-13 19:16:39,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-10-13 19:16:39,949 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2019-10-13 19:16:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:39,950 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-10-13 19:16:39,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 19:16:39,950 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-10-13 19:16:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 19:16:39,951 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:39,951 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:40,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:40,161 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:40,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:40,162 INFO L82 PathProgramCache]: Analyzing trace with hash -291122700, now seen corresponding path program 2 times [2019-10-13 19:16:40,162 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:40,162 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212393505] [2019-10-13 19:16:40,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:40,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:40,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:40,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212393505] [2019-10-13 19:16:40,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274485302] [2019-10-13 19:16:40,414 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 [2019-10-13 19:16:40,450 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:16:40,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:40,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 19:16:40,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:40,469 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:16:40,469 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2019-10-13 19:16:40,469 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628439632] [2019-10-13 19:16:40,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 19:16:40,470 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:40,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 19:16:40,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:16:40,471 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 17 states. [2019-10-13 19:16:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:40,956 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2019-10-13 19:16:40,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 19:16:40,957 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2019-10-13 19:16:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:40,958 INFO L225 Difference]: With dead ends: 46 [2019-10-13 19:16:40,958 INFO L226 Difference]: Without dead ends: 41 [2019-10-13 19:16:40,960 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2019-10-13 19:16:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-13 19:16:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-13 19:16:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 19:16:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-10-13 19:16:40,966 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2019-10-13 19:16:40,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:40,966 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-10-13 19:16:40,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 19:16:40,967 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-10-13 19:16:40,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 19:16:40,967 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:40,968 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:41,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:41,169 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:41,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:41,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1245533266, now seen corresponding path program 3 times [2019-10-13 19:16:41,171 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:41,171 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215815346] [2019-10-13 19:16:41,171 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:41,172 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:41,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:41,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215815346] [2019-10-13 19:16:41,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437564223] [2019-10-13 19:16:41,380 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 [2019-10-13 19:16:41,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 19:16:41,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:41,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 19:16:41,425 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 19:16:41,463 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:16:41,463 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4] total 21 [2019-10-13 19:16:41,463 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154817913] [2019-10-13 19:16:41,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 19:16:41,464 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:41,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 19:16:41,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:16:41,465 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2019-10-13 19:16:41,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:41,917 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2019-10-13 19:16:41,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 19:16:41,918 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2019-10-13 19:16:41,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:41,919 INFO L225 Difference]: With dead ends: 52 [2019-10-13 19:16:41,919 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 19:16:41,920 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 19:16:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 19:16:41,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-10-13 19:16:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-13 19:16:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-10-13 19:16:41,927 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 39 [2019-10-13 19:16:41,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:41,927 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-10-13 19:16:41,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 19:16:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-10-13 19:16:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 19:16:41,929 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:41,929 INFO L380 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:42,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:42,134 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:42,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:42,135 INFO L82 PathProgramCache]: Analyzing trace with hash -386885694, now seen corresponding path program 4 times [2019-10-13 19:16:42,135 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:42,135 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512831043] [2019-10-13 19:16:42,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:42,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:42,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:42,418 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512831043] [2019-10-13 19:16:42,418 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073350168] [2019-10-13 19:16:42,418 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 [2019-10-13 19:16:42,454 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:16:42,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:42,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 19:16:42,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:16:42,472 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:16:42,472 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 22 [2019-10-13 19:16:42,472 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79333537] [2019-10-13 19:16:42,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 19:16:42,473 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:42,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 19:16:42,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-13 19:16:42,474 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 22 states. [2019-10-13 19:16:42,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:42,933 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2019-10-13 19:16:42,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 19:16:42,933 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2019-10-13 19:16:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:42,935 INFO L225 Difference]: With dead ends: 58 [2019-10-13 19:16:42,935 INFO L226 Difference]: Without dead ends: 52 [2019-10-13 19:16:42,936 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2019-10-13 19:16:42,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-13 19:16:42,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-13 19:16:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-13 19:16:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-10-13 19:16:42,943 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 45 [2019-10-13 19:16:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:42,944 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-10-13 19:16:42,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 19:16:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-10-13 19:16:42,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-13 19:16:42,945 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:42,945 INFO L380 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:43,149 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:43,150 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:43,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:43,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1880804167, now seen corresponding path program 5 times [2019-10-13 19:16:43,151 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:43,151 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724191943] [2019-10-13 19:16:43,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:43,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:43,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:43,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724191943] [2019-10-13 19:16:43,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263836452] [2019-10-13 19:16:43,440 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 [2019-10-13 19:16:43,488 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-13 19:16:43,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:43,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 19:16:43,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-13 19:16:43,640 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:16:43,640 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8] total 31 [2019-10-13 19:16:43,641 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951793555] [2019-10-13 19:16:43,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-13 19:16:43,641 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:43,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-13 19:16:43,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 19:16:43,643 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 31 states. [2019-10-13 19:16:44,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:44,388 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2019-10-13 19:16:44,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-13 19:16:44,389 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 51 [2019-10-13 19:16:44,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:44,390 INFO L225 Difference]: With dead ends: 73 [2019-10-13 19:16:44,390 INFO L226 Difference]: Without dead ends: 67 [2019-10-13 19:16:44,392 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2019-10-13 19:16:44,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-13 19:16:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-10-13 19:16:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-13 19:16:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2019-10-13 19:16:44,400 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 51 [2019-10-13 19:16:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:44,401 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2019-10-13 19:16:44,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-13 19:16:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2019-10-13 19:16:44,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-13 19:16:44,402 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:44,402 INFO L380 BasicCegarLoop]: trace histogram [19, 13, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:44,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:44,609 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:44,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:44,609 INFO L82 PathProgramCache]: Analyzing trace with hash -863413544, now seen corresponding path program 6 times [2019-10-13 19:16:44,610 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:44,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511874769] [2019-10-13 19:16:44,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:44,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:44,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:45,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511874769] [2019-10-13 19:16:45,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627540793] [2019-10-13 19:16:45,119 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 [2019-10-13 19:16:45,205 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-13 19:16:45,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:45,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 19:16:45,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 81 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-13 19:16:45,542 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:16:45,542 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-10-13 19:16:45,542 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874026428] [2019-10-13 19:16:45,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-13 19:16:45,543 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:45,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-13 19:16:45,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 19:16:45,544 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 42 states. [2019-10-13 19:16:46,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:46,823 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2019-10-13 19:16:46,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-13 19:16:46,824 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 65 [2019-10-13 19:16:46,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:46,826 INFO L225 Difference]: With dead ends: 103 [2019-10-13 19:16:46,826 INFO L226 Difference]: Without dead ends: 89 [2019-10-13 19:16:46,829 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2019-10-13 19:16:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-13 19:16:46,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-10-13 19:16:46,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-13 19:16:46,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2019-10-13 19:16:46,837 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 65 [2019-10-13 19:16:46,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:46,838 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2019-10-13 19:16:46,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-13 19:16:46,838 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2019-10-13 19:16:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-13 19:16:46,839 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:46,839 INFO L380 BasicCegarLoop]: trace histogram [30, 20, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:47,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:47,055 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:47,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:47,055 INFO L82 PathProgramCache]: Analyzing trace with hash -2110042581, now seen corresponding path program 7 times [2019-10-13 19:16:47,056 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:47,056 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070473319] [2019-10-13 19:16:47,056 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:47,056 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:47,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:47,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070473319] [2019-10-13 19:16:47,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510464684] [2019-10-13 19:16:47,736 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 [2019-10-13 19:16:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:47,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-13 19:16:47,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 399 proven. 420 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-13 19:16:47,822 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:16:47,823 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 32] total 43 [2019-10-13 19:16:47,823 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990061398] [2019-10-13 19:16:47,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-13 19:16:47,824 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:47,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-13 19:16:47,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2019-10-13 19:16:47,825 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 43 states. [2019-10-13 19:16:49,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:49,104 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2019-10-13 19:16:49,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-13 19:16:49,104 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 87 [2019-10-13 19:16:49,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:49,106 INFO L225 Difference]: With dead ends: 132 [2019-10-13 19:16:49,106 INFO L226 Difference]: Without dead ends: 110 [2019-10-13 19:16:49,109 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2019-10-13 19:16:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-13 19:16:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-10-13 19:16:49,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-13 19:16:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2019-10-13 19:16:49,135 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 87 [2019-10-13 19:16:49,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:49,136 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2019-10-13 19:16:49,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-13 19:16:49,136 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2019-10-13 19:16:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-13 19:16:49,138 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:49,138 INFO L380 BasicCegarLoop]: trace histogram [41, 31, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:49,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:49,348 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:49,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:49,349 INFO L82 PathProgramCache]: Analyzing trace with hash 124988746, now seen corresponding path program 8 times [2019-10-13 19:16:49,350 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:49,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415273022] [2019-10-13 19:16:49,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:49,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:49,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:50,406 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415273022] [2019-10-13 19:16:50,406 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282486320] [2019-10-13 19:16:50,406 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 [2019-10-13 19:16:50,484 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:16:50,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:50,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-13 19:16:50,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 608 proven. 992 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-13 19:16:50,521 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:16:50,521 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 43] total 54 [2019-10-13 19:16:50,522 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24216723] [2019-10-13 19:16:50,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-10-13 19:16:50,523 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:50,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-10-13 19:16:50,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2019-10-13 19:16:50,524 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 54 states. [2019-10-13 19:16:52,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:52,403 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2019-10-13 19:16:52,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-10-13 19:16:52,403 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 109 [2019-10-13 19:16:52,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:52,405 INFO L225 Difference]: With dead ends: 152 [2019-10-13 19:16:52,406 INFO L226 Difference]: Without dead ends: 130 [2019-10-13 19:16:52,409 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2019-10-13 19:16:52,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-10-13 19:16:52,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2019-10-13 19:16:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-13 19:16:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2019-10-13 19:16:52,425 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 109 [2019-10-13 19:16:52,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:52,425 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2019-10-13 19:16:52,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-10-13 19:16:52,426 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2019-10-13 19:16:52,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 19:16:52,428 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:52,428 INFO L380 BasicCegarLoop]: trace histogram [51, 41, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:52,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:52,641 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:52,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:52,642 INFO L82 PathProgramCache]: Analyzing trace with hash -898909844, now seen corresponding path program 9 times [2019-10-13 19:16:52,643 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:52,643 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42843784] [2019-10-13 19:16:52,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:52,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:52,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:54,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42843784] [2019-10-13 19:16:54,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206127323] [2019-10-13 19:16:54,125 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 [2019-10-13 19:16:54,195 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-10-13 19:16:54,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:54,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 19:16:54,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 861 proven. 100 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2019-10-13 19:16:54,220 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:16:54,220 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 13] total 64 [2019-10-13 19:16:54,220 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014704750] [2019-10-13 19:16:54,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-10-13 19:16:54,221 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:54,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-10-13 19:16:54,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2019-10-13 19:16:54,223 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 64 states. [2019-10-13 19:16:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:56,729 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2019-10-13 19:16:56,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-10-13 19:16:56,730 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 129 [2019-10-13 19:16:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:56,731 INFO L225 Difference]: With dead ends: 136 [2019-10-13 19:16:56,731 INFO L226 Difference]: Without dead ends: 133 [2019-10-13 19:16:56,744 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2019-10-13 19:16:56,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-10-13 19:16:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2019-10-13 19:16:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-10-13 19:16:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2019-10-13 19:16:56,767 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2019-10-13 19:16:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:56,767 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2019-10-13 19:16:56,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-10-13 19:16:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2019-10-13 19:16:56,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 19:16:56,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:56,773 INFO L380 BasicCegarLoop]: trace histogram [52, 41, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:56,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:56,988 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:56,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:56,989 INFO L82 PathProgramCache]: Analyzing trace with hash -571471930, now seen corresponding path program 10 times [2019-10-13 19:16:56,989 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:56,989 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884913173] [2019-10-13 19:16:56,989 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:56,989 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:56,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:58,660 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884913173] [2019-10-13 19:16:58,660 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85081963] [2019-10-13 19:16:58,660 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 [2019-10-13 19:16:58,759 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:16:58,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:58,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 63 conjunts are in the unsatisfiable core [2019-10-13 19:16:58,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:58,802 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:16:58,802 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64] total 65 [2019-10-13 19:16:58,802 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290453110] [2019-10-13 19:16:58,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-10-13 19:16:58,803 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:58,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-10-13 19:16:58,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2019-10-13 19:16:58,804 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 65 states. [2019-10-13 19:17:01,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:01,331 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2019-10-13 19:17:01,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-10-13 19:17:01,331 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 131 [2019-10-13 19:17:01,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:01,333 INFO L225 Difference]: With dead ends: 138 [2019-10-13 19:17:01,333 INFO L226 Difference]: Without dead ends: 135 [2019-10-13 19:17:01,336 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2019-10-13 19:17:01,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-10-13 19:17:01,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2019-10-13 19:17:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-10-13 19:17:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2019-10-13 19:17:01,342 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 131 [2019-10-13 19:17:01,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:01,343 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2019-10-13 19:17:01,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-10-13 19:17:01,343 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2019-10-13 19:17:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 19:17:01,345 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:01,345 INFO L380 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:01,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:01,550 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:01,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:01,550 INFO L82 PathProgramCache]: Analyzing trace with hash 563750816, now seen corresponding path program 11 times [2019-10-13 19:17:01,551 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:01,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749000613] [2019-10-13 19:17:01,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:01,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:01,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:03,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749000613] [2019-10-13 19:17:03,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361895324] [2019-10-13 19:17:03,079 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 [2019-10-13 19:17:03,199 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2019-10-13 19:17:03,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:03,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 19:17:03,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 676 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2019-10-13 19:17:03,928 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:03,928 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 29] total 80 [2019-10-13 19:17:03,928 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95516049] [2019-10-13 19:17:03,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-10-13 19:17:03,929 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:03,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-10-13 19:17:03,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2019-10-13 19:17:03,930 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 80 states. [2019-10-13 19:17:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:07,478 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2019-10-13 19:17:07,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-10-13 19:17:07,478 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 133 [2019-10-13 19:17:07,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:07,480 INFO L225 Difference]: With dead ends: 168 [2019-10-13 19:17:07,480 INFO L226 Difference]: Without dead ends: 165 [2019-10-13 19:17:07,484 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2988 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2019-10-13 19:17:07,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-10-13 19:17:07,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-10-13 19:17:07,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-10-13 19:17:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2019-10-13 19:17:07,496 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 133 [2019-10-13 19:17:07,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:07,497 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2019-10-13 19:17:07,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-10-13 19:17:07,497 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2019-10-13 19:17:07,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 19:17:07,499 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:07,499 INFO L380 BasicCegarLoop]: trace histogram [68, 41, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:07,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:07,704 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:07,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:07,704 INFO L82 PathProgramCache]: Analyzing trace with hash 238893414, now seen corresponding path program 12 times [2019-10-13 19:17:07,704 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:07,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378463312] [2019-10-13 19:17:07,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:07,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:07,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:09,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378463312] [2019-10-13 19:17:09,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944318184] [2019-10-13 19:17:09,995 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 [2019-10-13 19:17:10,160 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2019-10-13 19:17:10,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:10,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-13 19:17:10,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2345 proven. 1089 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2019-10-13 19:17:10,543 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:10,543 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 36] total 87 [2019-10-13 19:17:10,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378228284] [2019-10-13 19:17:10,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-10-13 19:17:10,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:10,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-10-13 19:17:10,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2019-10-13 19:17:10,546 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 87 states. [2019-10-13 19:17:14,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:14,683 INFO L93 Difference]: Finished difference Result 182 states and 189 transitions. [2019-10-13 19:17:14,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-10-13 19:17:14,683 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 163 [2019-10-13 19:17:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:14,685 INFO L225 Difference]: With dead ends: 182 [2019-10-13 19:17:14,686 INFO L226 Difference]: Without dead ends: 179 [2019-10-13 19:17:14,688 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3563 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2019-10-13 19:17:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-10-13 19:17:14,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2019-10-13 19:17:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-10-13 19:17:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2019-10-13 19:17:14,696 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 163 [2019-10-13 19:17:14,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:14,696 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2019-10-13 19:17:14,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-10-13 19:17:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2019-10-13 19:17:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 19:17:14,698 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:14,699 INFO L380 BasicCegarLoop]: trace histogram [75, 41, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:14,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:14,902 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:14,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:14,903 INFO L82 PathProgramCache]: Analyzing trace with hash 555872220, now seen corresponding path program 13 times [2019-10-13 19:17:14,903 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:14,903 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981073743] [2019-10-13 19:17:14,903 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:14,903 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:14,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:17,561 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981073743] [2019-10-13 19:17:17,561 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350581195] [2019-10-13 19:17:17,561 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 [2019-10-13 19:17:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:17,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 86 conjunts are in the unsatisfiable core [2019-10-13 19:17:17,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:17,733 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:17,733 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87] total 88 [2019-10-13 19:17:17,734 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797592795] [2019-10-13 19:17:17,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-10-13 19:17:17,734 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:17,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-10-13 19:17:17,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2019-10-13 19:17:17,736 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 88 states.