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/eca-rers2012/Problem02_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:52:47,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:52:47,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:52:47,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:52:47,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:52:47,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:52:47,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:52:47,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:52:47,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:52:47,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:52:47,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:52:47,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:52:47,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:52:47,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:52:47,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:52:47,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:52:47,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:52:47,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:52:47,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:52:47,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:52:47,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:52:47,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:52:47,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:52:47,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:52:47,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:52:47,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:52:47,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:52:47,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:52:47,790 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 [2019-10-14 21:52:47,817 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:52:47,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:52:47,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:52:47,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:52:47,819 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:52:47,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:52:47,820 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:52:47,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:52:47,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:52:47,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:52:47,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:52:47,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:52:47,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:52:47,821 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:52:47,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:52:47,821 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:52:47,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:52:47,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:52:47,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:52:47,822 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:52:47,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:52:47,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:52:47,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:52:47,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:52:47,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:52:47,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:52:47,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:52:47,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:52:47,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:52:48,112 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:52:48,125 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:52:48,129 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:52:48,130 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:52:48,131 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:52:48,132 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label06.c [2019-10-14 21:52:48,195 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98e83f5c4/5257319b1f704f698694d1971746d2b8/FLAG7e9c1fd6e [2019-10-14 21:52:48,747 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:52:48,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label06.c [2019-10-14 21:52:48,762 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98e83f5c4/5257319b1f704f698694d1971746d2b8/FLAG7e9c1fd6e [2019-10-14 21:52:49,080 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98e83f5c4/5257319b1f704f698694d1971746d2b8 [2019-10-14 21:52:49,092 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:52:49,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:52:49,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:52:49,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:52:49,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:52:49,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:52:49" (1/1) ... [2019-10-14 21:52:49,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3304fef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:52:49, skipping insertion in model container [2019-10-14 21:52:49,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:52:49" (1/1) ... [2019-10-14 21:52:49,116 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:52:49,184 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:52:49,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:52:49,737 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:52:49,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:52:49,892 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:52:49,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:52:49 WrapperNode [2019-10-14 21:52:49,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:52:49,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:52:49,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:52:49,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:52:49,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:52:49" (1/1) ... [2019-10-14 21:52:49,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:52:49" (1/1) ... [2019-10-14 21:52:49,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:52:49" (1/1) ... [2019-10-14 21:52:49,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:52:49" (1/1) ... [2019-10-14 21:52:49,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:52:49" (1/1) ... [2019-10-14 21:52:50,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:52:49" (1/1) ... [2019-10-14 21:52:50,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:52:49" (1/1) ... [2019-10-14 21:52:50,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:52:50,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:52:50,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:52:50,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:52:50,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:52:49" (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 [2019-10-14 21:52:50,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:52:50,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:52:50,080 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:52:50,080 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:52:50,080 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:52:50,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:52:50,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:52:50,081 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:52:50,081 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:52:50,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:52:50,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:52:51,413 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:52:51,413 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:52:51,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:52:51 BoogieIcfgContainer [2019-10-14 21:52:51,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:52:51,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:52:51,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:52:51,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:52:51,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:52:49" (1/3) ... [2019-10-14 21:52:51,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10afa6b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:52:51, skipping insertion in model container [2019-10-14 21:52:51,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:52:49" (2/3) ... [2019-10-14 21:52:51,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10afa6b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:52:51, skipping insertion in model container [2019-10-14 21:52:51,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:52:51" (3/3) ... [2019-10-14 21:52:51,425 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label06.c [2019-10-14 21:52:51,438 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:52:51,450 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:52:51,464 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:52:51,510 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:52:51,510 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:52:51,512 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:52:51,512 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:52:51,512 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:52:51,512 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:52:51,513 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:52:51,513 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:52:51,553 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 21:52:51,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-14 21:52:51,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:52:51,579 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, 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, 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, 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, 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, 1] [2019-10-14 21:52:51,582 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:52:51,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:52:51,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1121979298, now seen corresponding path program 1 times [2019-10-14 21:52:51,599 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:52:51,599 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931807661] [2019-10-14 21:52:51,600 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:51,600 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:51,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:52:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:52:52,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931807661] [2019-10-14 21:52:52,355 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:52:52,355 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:52:52,356 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646130655] [2019-10-14 21:52:52,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:52:52,364 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:52:52,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:52:52,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:52:52,381 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 5 states. [2019-10-14 21:52:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:52:54,674 INFO L93 Difference]: Finished difference Result 813 states and 1406 transitions. [2019-10-14 21:52:54,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:52:54,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2019-10-14 21:52:54,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:52:54,694 INFO L225 Difference]: With dead ends: 813 [2019-10-14 21:52:54,695 INFO L226 Difference]: Without dead ends: 488 [2019-10-14 21:52:54,702 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:52:54,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2019-10-14 21:52:54,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 481. [2019-10-14 21:52:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2019-10-14 21:52:54,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 692 transitions. [2019-10-14 21:52:54,824 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 692 transitions. Word has length 146 [2019-10-14 21:52:54,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:52:54,825 INFO L462 AbstractCegarLoop]: Abstraction has 481 states and 692 transitions. [2019-10-14 21:52:54,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:52:54,826 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 692 transitions. [2019-10-14 21:52:54,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-14 21:52:54,836 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:52:54,837 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 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, 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, 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, 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, 1] [2019-10-14 21:52:54,838 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:52:54,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:52:54,838 INFO L82 PathProgramCache]: Analyzing trace with hash -74166087, now seen corresponding path program 1 times [2019-10-14 21:52:54,838 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:52:54,839 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963256148] [2019-10-14 21:52:54,839 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:54,839 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:54,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:52:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:52:55,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963256148] [2019-10-14 21:52:55,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418459542] [2019-10-14 21:52:55,249 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 [2019-10-14 21:52:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:55,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:52:55,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:52:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:52:55,459 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:52:55,459 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:52:55,459 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50985018] [2019-10-14 21:52:55,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:52:55,462 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:52:55,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:52:55,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:52:55,462 INFO L87 Difference]: Start difference. First operand 481 states and 692 transitions. Second operand 3 states. [2019-10-14 21:52:56,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:52:56,017 INFO L93 Difference]: Finished difference Result 1246 states and 1820 transitions. [2019-10-14 21:52:56,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:52:56,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2019-10-14 21:52:56,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:52:56,025 INFO L225 Difference]: With dead ends: 1246 [2019-10-14 21:52:56,025 INFO L226 Difference]: Without dead ends: 771 [2019-10-14 21:52:56,028 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:52:56,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2019-10-14 21:52:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 626. [2019-10-14 21:52:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-14 21:52:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 917 transitions. [2019-10-14 21:52:56,070 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 917 transitions. Word has length 154 [2019-10-14 21:52:56,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:52:56,071 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 917 transitions. [2019-10-14 21:52:56,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:52:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 917 transitions. [2019-10-14 21:52:56,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-14 21:52:56,076 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:52:56,076 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:52:56,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:52:56,284 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:52:56,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:52:56,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1806866058, now seen corresponding path program 1 times [2019-10-14 21:52:56,285 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:52:56,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117587411] [2019-10-14 21:52:56,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:56,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:56,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:52:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:52:56,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117587411] [2019-10-14 21:52:56,523 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:52:56,523 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:52:56,523 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96832621] [2019-10-14 21:52:56,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:52:56,524 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:52:56,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:52:56,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:52:56,525 INFO L87 Difference]: Start difference. First operand 626 states and 917 transitions. Second operand 9 states. [2019-10-14 21:52:58,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:52:58,567 INFO L93 Difference]: Finished difference Result 2500 states and 3874 transitions. [2019-10-14 21:52:58,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:52:58,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 168 [2019-10-14 21:52:58,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:52:58,583 INFO L225 Difference]: With dead ends: 2500 [2019-10-14 21:52:58,584 INFO L226 Difference]: Without dead ends: 1880 [2019-10-14 21:52:58,587 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:52:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2019-10-14 21:52:58,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1828. [2019-10-14 21:52:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1828 states. [2019-10-14 21:52:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 2656 transitions. [2019-10-14 21:52:58,675 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 2656 transitions. Word has length 168 [2019-10-14 21:52:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:52:58,676 INFO L462 AbstractCegarLoop]: Abstraction has 1828 states and 2656 transitions. [2019-10-14 21:52:58,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:52:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 2656 transitions. [2019-10-14 21:52:58,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-14 21:52:58,684 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:52:58,684 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:52:58,685 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:52:58,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:52:58,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1864889838, now seen corresponding path program 1 times [2019-10-14 21:52:58,685 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:52:58,686 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116604685] [2019-10-14 21:52:58,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:58,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:58,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:52:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:52:59,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116604685] [2019-10-14 21:52:59,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521157604] [2019-10-14 21:52:59,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:52:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:59,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:52:59,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:52:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:52:59,239 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:52:59,239 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:52:59,239 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52642514] [2019-10-14 21:52:59,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:52:59,241 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:52:59,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:52:59,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:52:59,241 INFO L87 Difference]: Start difference. First operand 1828 states and 2656 transitions. Second operand 3 states. [2019-10-14 21:52:59,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:52:59,883 INFO L93 Difference]: Finished difference Result 4963 states and 7372 transitions. [2019-10-14 21:52:59,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:52:59,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2019-10-14 21:52:59,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:52:59,906 INFO L225 Difference]: With dead ends: 4963 [2019-10-14 21:52:59,906 INFO L226 Difference]: Without dead ends: 3141 [2019-10-14 21:52:59,912 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:52:59,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3141 states. [2019-10-14 21:52:59,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3141 to 2994. [2019-10-14 21:52:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2994 states. [2019-10-14 21:53:00,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 3976 transitions. [2019-10-14 21:53:00,007 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 3976 transitions. Word has length 172 [2019-10-14 21:53:00,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:53:00,008 INFO L462 AbstractCegarLoop]: Abstraction has 2994 states and 3976 transitions. [2019-10-14 21:53:00,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:53:00,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 3976 transitions. [2019-10-14 21:53:00,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-14 21:53:00,018 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:53:00,018 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:53:00,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:53:00,224 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:53:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:53:00,225 INFO L82 PathProgramCache]: Analyzing trace with hash -788488225, now seen corresponding path program 1 times [2019-10-14 21:53:00,225 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:53:00,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476261933] [2019-10-14 21:53:00,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:53:00,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:53:00,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:53:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:53:00,479 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476261933] [2019-10-14 21:53:00,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486023577] [2019-10-14 21:53:00,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:53:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:00,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:53:00,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:53:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:53:00,616 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:53:00,617 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-10-14 21:53:00,617 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315199104] [2019-10-14 21:53:00,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:53:00,618 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:53:00,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:53:00,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:53:00,619 INFO L87 Difference]: Start difference. First operand 2994 states and 3976 transitions. Second operand 3 states. [2019-10-14 21:53:01,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:53:01,286 INFO L93 Difference]: Finished difference Result 7893 states and 10722 transitions. [2019-10-14 21:53:01,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:53:01,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2019-10-14 21:53:01,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:53:01,315 INFO L225 Difference]: With dead ends: 7893 [2019-10-14 21:53:01,316 INFO L226 Difference]: Without dead ends: 4905 [2019-10-14 21:53:01,326 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:53:01,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4905 states. [2019-10-14 21:53:01,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4905 to 4184. [2019-10-14 21:53:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4184 states. [2019-10-14 21:53:01,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4184 states to 4184 states and 5379 transitions. [2019-10-14 21:53:01,476 INFO L78 Accepts]: Start accepts. Automaton has 4184 states and 5379 transitions. Word has length 181 [2019-10-14 21:53:01,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:53:01,478 INFO L462 AbstractCegarLoop]: Abstraction has 4184 states and 5379 transitions. [2019-10-14 21:53:01,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:53:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 4184 states and 5379 transitions. [2019-10-14 21:53:01,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-14 21:53:01,501 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:53:01,501 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2019-10-14 21:53:01,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:53:01,715 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:53:01,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:53:01,716 INFO L82 PathProgramCache]: Analyzing trace with hash -736216745, now seen corresponding path program 1 times [2019-10-14 21:53:01,716 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:53:01,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828350115] [2019-10-14 21:53:01,716 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:53:01,717 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:53:01,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:53:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:01,918 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:53:01,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828350115] [2019-10-14 21:53:01,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721331896] [2019-10-14 21:53:01,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:53:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:02,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:53:02,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:53:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:53:02,173 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:53:02,173 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:53:02,173 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862635180] [2019-10-14 21:53:02,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:53:02,174 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:53:02,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:53:02,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:53:02,175 INFO L87 Difference]: Start difference. First operand 4184 states and 5379 transitions. Second operand 11 states. [2019-10-14 21:53:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:53:06,675 INFO L93 Difference]: Finished difference Result 11818 states and 17330 transitions. [2019-10-14 21:53:06,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:53:06,676 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 185 [2019-10-14 21:53:06,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:53:06,716 INFO L225 Difference]: With dead ends: 11818 [2019-10-14 21:53:06,717 INFO L226 Difference]: Without dead ends: 7640 [2019-10-14 21:53:06,734 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:53:06,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7640 states. [2019-10-14 21:53:06,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7640 to 6406. [2019-10-14 21:53:06,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6406 states. [2019-10-14 21:53:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6406 states to 6406 states and 7678 transitions. [2019-10-14 21:53:06,986 INFO L78 Accepts]: Start accepts. Automaton has 6406 states and 7678 transitions. Word has length 185 [2019-10-14 21:53:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:53:06,987 INFO L462 AbstractCegarLoop]: Abstraction has 6406 states and 7678 transitions. [2019-10-14 21:53:06,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:53:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand 6406 states and 7678 transitions. [2019-10-14 21:53:07,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-10-14 21:53:07,011 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:53:07,012 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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] [2019-10-14 21:53:07,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:53:07,219 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:53:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:53:07,219 INFO L82 PathProgramCache]: Analyzing trace with hash -499769692, now seen corresponding path program 1 times [2019-10-14 21:53:07,219 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:53:07,219 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779703533] [2019-10-14 21:53:07,219 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:53:07,220 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:53:07,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:53:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 125 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:53:07,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779703533] [2019-10-14 21:53:07,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149810260] [2019-10-14 21:53:07,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 21:53:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:07,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:53:07,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:53:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 130 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:53:08,084 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:53:08,084 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2019-10-14 21:53:08,084 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726687957] [2019-10-14 21:53:08,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:53:08,086 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:53:08,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:53:08,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:53:08,087 INFO L87 Difference]: Start difference. First operand 6406 states and 7678 transitions. Second operand 12 states. [2019-10-14 21:53:11,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:53:11,326 INFO L93 Difference]: Finished difference Result 12477 states and 14965 transitions. [2019-10-14 21:53:11,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:53:11,327 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 251 [2019-10-14 21:53:11,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:53:11,349 INFO L225 Difference]: With dead ends: 12477 [2019-10-14 21:53:11,349 INFO L226 Difference]: Without dead ends: 5495 [2019-10-14 21:53:11,365 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 263 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:53:11,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2019-10-14 21:53:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 4615. [2019-10-14 21:53:11,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4615 states. [2019-10-14 21:53:11,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4615 states to 4615 states and 5294 transitions. [2019-10-14 21:53:11,494 INFO L78 Accepts]: Start accepts. Automaton has 4615 states and 5294 transitions. Word has length 251 [2019-10-14 21:53:11,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:53:11,495 INFO L462 AbstractCegarLoop]: Abstraction has 4615 states and 5294 transitions. [2019-10-14 21:53:11,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:53:11,495 INFO L276 IsEmpty]: Start isEmpty. Operand 4615 states and 5294 transitions. [2019-10-14 21:53:11,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2019-10-14 21:53:11,511 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:53:11,512 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1] [2019-10-14 21:53:11,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:53:11,725 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:53:11,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:53:11,726 INFO L82 PathProgramCache]: Analyzing trace with hash -966132511, now seen corresponding path program 1 times [2019-10-14 21:53:11,726 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:53:11,727 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809367601] [2019-10-14 21:53:11,727 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:53:11,727 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:53:11,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:53:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 126 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:53:12,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809367601] [2019-10-14 21:53:12,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516700167] [2019-10-14 21:53:12,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 21:53:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:12,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:53:12,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:53:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 21:53:12,362 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:53:12,362 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-14 21:53:12,363 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788990319] [2019-10-14 21:53:12,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:53:12,365 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:53:12,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:53:12,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:53:12,372 INFO L87 Difference]: Start difference. First operand 4615 states and 5294 transitions. Second operand 11 states. [2019-10-14 21:53:13,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:53:13,791 INFO L93 Difference]: Finished difference Result 8678 states and 9940 transitions. [2019-10-14 21:53:13,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:53:13,794 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 274 [2019-10-14 21:53:13,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:53:13,820 INFO L225 Difference]: With dead ends: 8678 [2019-10-14 21:53:13,821 INFO L226 Difference]: Without dead ends: 4305 [2019-10-14 21:53:13,831 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:53:13,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2019-10-14 21:53:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 4007. [2019-10-14 21:53:13,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4007 states. [2019-10-14 21:53:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 4358 transitions. [2019-10-14 21:53:13,943 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 4358 transitions. Word has length 274 [2019-10-14 21:53:13,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:53:13,943 INFO L462 AbstractCegarLoop]: Abstraction has 4007 states and 4358 transitions. [2019-10-14 21:53:13,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:53:13,943 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 4358 transitions. [2019-10-14 21:53:13,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-10-14 21:53:13,956 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:53:13,956 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1] [2019-10-14 21:53:14,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:53:14,161 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:53:14,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:53:14,162 INFO L82 PathProgramCache]: Analyzing trace with hash -869569175, now seen corresponding path program 1 times [2019-10-14 21:53:14,162 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:53:14,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600943839] [2019-10-14 21:53:14,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:53:14,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:53:14,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:53:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 134 proven. 43 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-14 21:53:14,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600943839] [2019-10-14 21:53:14,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999311299] [2019-10-14 21:53:14,410 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2019-10-14 21:53:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:14,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:53:14,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:53:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 21:53:14,642 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:53:14,643 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2019-10-14 21:53:14,643 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283743859] [2019-10-14 21:53:14,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:53:14,644 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:53:14,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:53:14,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:53:14,645 INFO L87 Difference]: Start difference. First operand 4007 states and 4358 transitions. Second operand 9 states. [2019-10-14 21:53:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:53:16,435 INFO L93 Difference]: Finished difference Result 7461 states and 8089 transitions. [2019-10-14 21:53:16,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:53:16,438 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 278 [2019-10-14 21:53:16,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:53:16,446 INFO L225 Difference]: With dead ends: 7461 [2019-10-14 21:53:16,447 INFO L226 Difference]: Without dead ends: 2837 [2019-10-14 21:53:16,454 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:53:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2837 states. [2019-10-14 21:53:16,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2837 to 2240. [2019-10-14 21:53:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2240 states. [2019-10-14 21:53:16,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 2333 transitions. [2019-10-14 21:53:16,499 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 2333 transitions. Word has length 278 [2019-10-14 21:53:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:53:16,500 INFO L462 AbstractCegarLoop]: Abstraction has 2240 states and 2333 transitions. [2019-10-14 21:53:16,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:53:16,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 2333 transitions. [2019-10-14 21:53:16,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-10-14 21:53:16,508 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:53:16,509 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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] [2019-10-14 21:53:16,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:53:16,713 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:53:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:53:16,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1641491959, now seen corresponding path program 1 times [2019-10-14 21:53:16,714 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:53:16,714 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960644448] [2019-10-14 21:53:16,714 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:53:16,715 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:53:16,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:53:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 245 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-14 21:53:17,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960644448] [2019-10-14 21:53:17,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066278967] [2019-10-14 21:53:17,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:53:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:17,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:53:17,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:53:17,470 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:53:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 246 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 21:53:17,614 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:53:17,614 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-10-14 21:53:17,614 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619231174] [2019-10-14 21:53:17,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:53:17,616 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:53:17,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:53:17,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:53:17,616 INFO L87 Difference]: Start difference. First operand 2240 states and 2333 transitions. Second operand 13 states. [2019-10-14 21:53:20,674 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2019-10-14 21:53:21,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:53:21,002 INFO L93 Difference]: Finished difference Result 4352 states and 4536 transitions. [2019-10-14 21:53:21,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:53:21,008 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 309 [2019-10-14 21:53:21,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:53:21,015 INFO L225 Difference]: With dead ends: 4352 [2019-10-14 21:53:21,015 INFO L226 Difference]: Without dead ends: 2554 [2019-10-14 21:53:21,020 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:53:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2019-10-14 21:53:21,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 1944. [2019-10-14 21:53:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1944 states. [2019-10-14 21:53:21,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 2019 transitions. [2019-10-14 21:53:21,064 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 2019 transitions. Word has length 309 [2019-10-14 21:53:21,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:53:21,065 INFO L462 AbstractCegarLoop]: Abstraction has 1944 states and 2019 transitions. [2019-10-14 21:53:21,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:53:21,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 2019 transitions. [2019-10-14 21:53:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2019-10-14 21:53:21,075 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:53:21,075 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:53:21,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:53:21,280 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:53:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:53:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash 724273390, now seen corresponding path program 1 times [2019-10-14 21:53:21,281 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:53:21,282 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013730427] [2019-10-14 21:53:21,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:53:21,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:53:21,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:53:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 315 proven. 35 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 21:53:22,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013730427] [2019-10-14 21:53:22,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401696367] [2019-10-14 21:53:22,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 21:53:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:53:22,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:53:22,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:53:22,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:53:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 345 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-14 21:53:22,824 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:53:22,824 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5] total 22 [2019-10-14 21:53:22,824 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688334777] [2019-10-14 21:53:22,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:53:22,825 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:53:22,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:53:22,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:53:22,827 INFO L87 Difference]: Start difference. First operand 1944 states and 2019 transitions. Second operand 22 states.