/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:14:49,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:14:49,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:14:49,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:14:49,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:14:49,982 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:14:49,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:14:49,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:14:49,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:14:49,985 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:14:49,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:14:49,986 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:14:49,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:14:49,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:14:49,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:14:49,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:14:49,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:14:49,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:14:49,988 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:14:49,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:14:49,989 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:14:49,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:14:49,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:14:49,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:14:49,990 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:14:49,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:14:49,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:14:49,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:14:49,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:14:49,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:14:49,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:14:49,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:14:49,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:14:49,992 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:14:50,344 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:14:50,359 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:14:50,363 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:14:50,364 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:14:50,365 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:14:50,366 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label51.c [2019-11-06 19:14:50,443 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4323fced9/a834204dbd884bf3bc49624ab1bf1bf0/FLAG40a21f99e [2019-11-06 19:14:51,038 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:14:51,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label51.c [2019-11-06 19:14:51,054 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4323fced9/a834204dbd884bf3bc49624ab1bf1bf0/FLAG40a21f99e [2019-11-06 19:14:51,294 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4323fced9/a834204dbd884bf3bc49624ab1bf1bf0 [2019-11-06 19:14:51,302 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:14:51,304 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:14:51,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:51,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:14:51,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:14:51,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:51" (1/1) ... [2019-11-06 19:14:51,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a10aa08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:51, skipping insertion in model container [2019-11-06 19:14:51,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:51" (1/1) ... [2019-11-06 19:14:51,320 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:14:51,386 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:14:51,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:51,987 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:14:52,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:52,296 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:14:52,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:52 WrapperNode [2019-11-06 19:14:52,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:52,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:14:52,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:14:52,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:14:52,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:52" (1/1) ... [2019-11-06 19:14:52,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:52" (1/1) ... [2019-11-06 19:14:52,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:52" (1/1) ... [2019-11-06 19:14:52,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:52" (1/1) ... [2019-11-06 19:14:52,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:52" (1/1) ... [2019-11-06 19:14:52,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:52" (1/1) ... [2019-11-06 19:14:52,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:52" (1/1) ... [2019-11-06 19:14:52,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:14:52,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:14:52,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:14:52,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:14:52,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:14:52,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:14:52,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:14:52,594 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:14:52,594 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:14:52,595 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:14:52,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:14:52,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:14:52,596 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:14:52,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:14:52,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:14:52,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:14:54,210 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:14:54,210 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:14:54,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:14:54 BoogieIcfgContainer [2019-11-06 19:14:54,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:14:54,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:14:54,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:14:54,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:14:54,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:14:51" (1/3) ... [2019-11-06 19:14:54,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a818bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:14:54, skipping insertion in model container [2019-11-06 19:14:54,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:52" (2/3) ... [2019-11-06 19:14:54,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a818bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:14:54, skipping insertion in model container [2019-11-06 19:14:54,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:14:54" (3/3) ... [2019-11-06 19:14:54,228 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label51.c [2019-11-06 19:14:54,242 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:14:54,252 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:14:54,265 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:14:54,302 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:14:54,303 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:14:54,303 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:14:54,303 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:14:54,303 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:14:54,303 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:14:54,303 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:14:54,304 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:14:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:14:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 19:14:54,349 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:54,350 INFO L410 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] [2019-11-06 19:14:54,352 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:54,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:54,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1352567654, now seen corresponding path program 1 times [2019-11-06 19:14:54,371 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:54,371 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796954611] [2019-11-06 19:14:54,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:54,794 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796954611] [2019-11-06 19:14:54,795 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:14:54,796 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:14:54,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712006058] [2019-11-06 19:14:54,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:54,803 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:54,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:54,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:14:54,820 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:14:57,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:57,396 INFO L93 Difference]: Finished difference Result 886 states and 1612 transitions. [2019-11-06 19:14:57,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:14:57,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2019-11-06 19:14:57,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:57,418 INFO L225 Difference]: With dead ends: 886 [2019-11-06 19:14:57,419 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:14:57,427 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:14:57,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-11-06 19:14:57,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-11-06 19:14:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 861 transitions. [2019-11-06 19:14:57,525 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 861 transitions. Word has length 41 [2019-11-06 19:14:57,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:57,526 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 861 transitions. [2019-11-06 19:14:57,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:57,526 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 861 transitions. [2019-11-06 19:14:57,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-06 19:14:57,533 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:57,534 INFO L410 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, 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] [2019-11-06 19:14:57,534 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:57,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:57,534 INFO L82 PathProgramCache]: Analyzing trace with hash 430859462, now seen corresponding path program 1 times [2019-11-06 19:14:57,535 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:57,535 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622981872] [2019-11-06 19:14:57,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:57,889 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622981872] [2019-11-06 19:14:57,889 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:14:57,890 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:14:57,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3761854] [2019-11-06 19:14:57,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:14:57,892 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:57,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:14:57,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:14:57,893 INFO L87 Difference]: Start difference. First operand 560 states and 861 transitions. Second operand 8 states. [2019-11-06 19:15:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:01,289 INFO L93 Difference]: Finished difference Result 2118 states and 3534 transitions. [2019-11-06 19:15:01,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:15:01,290 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2019-11-06 19:15:01,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:01,314 INFO L225 Difference]: With dead ends: 2118 [2019-11-06 19:15:01,315 INFO L226 Difference]: Without dead ends: 1564 [2019-11-06 19:15:01,318 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:15:01,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2019-11-06 19:15:01,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1520. [2019-11-06 19:15:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1520 states. [2019-11-06 19:15:01,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 2204 transitions. [2019-11-06 19:15:01,447 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 2204 transitions. Word has length 135 [2019-11-06 19:15:01,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:01,450 INFO L462 AbstractCegarLoop]: Abstraction has 1520 states and 2204 transitions. [2019-11-06 19:15:01,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:15:01,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 2204 transitions. [2019-11-06 19:15:01,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-06 19:15:01,465 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:01,466 INFO L410 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, 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] [2019-11-06 19:15:01,466 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:01,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:01,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1520330050, now seen corresponding path program 1 times [2019-11-06 19:15:01,467 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:01,467 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117840422] [2019-11-06 19:15:01,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:01,995 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117840422] [2019-11-06 19:15:01,995 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:01,996 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:15:01,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115391616] [2019-11-06 19:15:01,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:15:01,997 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:01,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:15:01,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:15:01,998 INFO L87 Difference]: Start difference. First operand 1520 states and 2204 transitions. Second operand 9 states. [2019-11-06 19:15:03,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:03,782 INFO L93 Difference]: Finished difference Result 3106 states and 4911 transitions. [2019-11-06 19:15:03,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:15:03,783 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 181 [2019-11-06 19:15:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:03,801 INFO L225 Difference]: With dead ends: 3106 [2019-11-06 19:15:03,802 INFO L226 Difference]: Without dead ends: 1592 [2019-11-06 19:15:03,807 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:15:03,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2019-11-06 19:15:03,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1520. [2019-11-06 19:15:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1520 states. [2019-11-06 19:15:03,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 2124 transitions. [2019-11-06 19:15:03,915 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 2124 transitions. Word has length 181 [2019-11-06 19:15:03,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:03,917 INFO L462 AbstractCegarLoop]: Abstraction has 1520 states and 2124 transitions. [2019-11-06 19:15:03,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:15:03,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 2124 transitions. [2019-11-06 19:15:03,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-11-06 19:15:03,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:03,924 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-11-06 19:15:03,925 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:03,925 INFO L82 PathProgramCache]: Analyzing trace with hash -906348779, now seen corresponding path program 1 times [2019-11-06 19:15:03,926 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:03,927 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784587308] [2019-11-06 19:15:03,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:15:04,285 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784587308] [2019-11-06 19:15:04,286 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101848439] [2019-11-06 19:15:04,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:04,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:04,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:04,564 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:04,565 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:04,565 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:15:04,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830969371] [2019-11-06 19:15:04,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:15:04,566 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:04,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:15:04,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:15:04,567 INFO L87 Difference]: Start difference. First operand 1520 states and 2124 transitions. Second operand 11 states. [2019-11-06 19:15:10,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:10,327 INFO L93 Difference]: Finished difference Result 5468 states and 8833 transitions. [2019-11-06 19:15:10,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-06 19:15:10,327 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 200 [2019-11-06 19:15:10,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:10,352 INFO L225 Difference]: With dead ends: 5468 [2019-11-06 19:15:10,353 INFO L226 Difference]: Without dead ends: 3176 [2019-11-06 19:15:10,362 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=1379, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 19:15:10,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2019-11-06 19:15:10,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2924. [2019-11-06 19:15:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2924 states. [2019-11-06 19:15:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 4335 transitions. [2019-11-06 19:15:10,479 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 4335 transitions. Word has length 200 [2019-11-06 19:15:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:10,479 INFO L462 AbstractCegarLoop]: Abstraction has 2924 states and 4335 transitions. [2019-11-06 19:15:10,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:15:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 4335 transitions. [2019-11-06 19:15:10,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2019-11-06 19:15:10,486 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:10,486 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2019-11-06 19:15:10,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:10,696 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:10,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:10,697 INFO L82 PathProgramCache]: Analyzing trace with hash 311736925, now seen corresponding path program 1 times [2019-11-06 19:15:10,697 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:10,698 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837266844] [2019-11-06 19:15:10,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:15:11,227 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837266844] [2019-11-06 19:15:11,227 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838028079] [2019-11-06 19:15:11,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:11,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:11,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-06 19:15:11,395 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:11,395 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 14 [2019-11-06 19:15:11,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058738662] [2019-11-06 19:15:11,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:11,396 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:11,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:11,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:15:11,397 INFO L87 Difference]: Start difference. First operand 2924 states and 4335 transitions. Second operand 3 states. [2019-11-06 19:15:12,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:12,109 INFO L93 Difference]: Finished difference Result 6800 states and 10134 transitions. [2019-11-06 19:15:12,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:12,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 252 [2019-11-06 19:15:12,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:12,130 INFO L225 Difference]: With dead ends: 6800 [2019-11-06 19:15:12,131 INFO L226 Difference]: Without dead ends: 3882 [2019-11-06 19:15:12,145 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:15:12,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2019-11-06 19:15:12,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3110. [2019-11-06 19:15:12,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3110 states. [2019-11-06 19:15:12,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3110 states to 3110 states and 4437 transitions. [2019-11-06 19:15:12,253 INFO L78 Accepts]: Start accepts. Automaton has 3110 states and 4437 transitions. Word has length 252 [2019-11-06 19:15:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:12,255 INFO L462 AbstractCegarLoop]: Abstraction has 3110 states and 4437 transitions. [2019-11-06 19:15:12,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3110 states and 4437 transitions. [2019-11-06 19:15:12,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-11-06 19:15:12,263 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:12,263 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2019-11-06 19:15:12,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:12,467 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:12,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:12,467 INFO L82 PathProgramCache]: Analyzing trace with hash 657294153, now seen corresponding path program 1 times [2019-11-06 19:15:12,469 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:12,469 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110155958] [2019-11-06 19:15:12,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 138 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:15:12,931 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110155958] [2019-11-06 19:15:12,935 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471087110] [2019-11-06 19:15:12,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:13,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:15:13,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:13,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:15:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-06 19:15:13,313 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:13,313 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-11-06 19:15:13,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592644333] [2019-11-06 19:15:13,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:13,315 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:13,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:13,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:15:13,316 INFO L87 Difference]: Start difference. First operand 3110 states and 4437 transitions. Second operand 5 states. [2019-11-06 19:15:16,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:16,250 INFO L93 Difference]: Finished difference Result 6508 states and 8774 transitions. [2019-11-06 19:15:16,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:15:16,251 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 258 [2019-11-06 19:15:16,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:16,264 INFO L225 Difference]: With dead ends: 6508 [2019-11-06 19:15:16,264 INFO L226 Difference]: Without dead ends: 3218 [2019-11-06 19:15:16,278 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:15:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2019-11-06 19:15:16,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 3204. [2019-11-06 19:15:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3204 states. [2019-11-06 19:15:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 4063 transitions. [2019-11-06 19:15:16,348 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 4063 transitions. Word has length 258 [2019-11-06 19:15:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:16,348 INFO L462 AbstractCegarLoop]: Abstraction has 3204 states and 4063 transitions. [2019-11-06 19:15:16,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:16,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 4063 transitions. [2019-11-06 19:15:16,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2019-11-06 19:15:16,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:16,356 INFO L410 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, 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, 3, 3, 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, 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] [2019-11-06 19:15:16,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:16,561 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:16,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:16,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1425495407, now seen corresponding path program 1 times [2019-11-06 19:15:16,562 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:16,562 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697006917] [2019-11-06 19:15:16,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 112 proven. 256 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:15:17,806 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697006917] [2019-11-06 19:15:17,807 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726396847] [2019-11-06 19:15:17,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:17,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:15:17,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:18,017 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:15:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 287 proven. 53 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-06 19:15:18,216 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:18,216 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-06 19:15:18,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334691404] [2019-11-06 19:15:18,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:15:18,218 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:18,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:15:18,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:15:18,219 INFO L87 Difference]: Start difference. First operand 3204 states and 4063 transitions. Second operand 16 states. [2019-11-06 19:15:22,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:22,006 INFO L93 Difference]: Finished difference Result 6311 states and 8084 transitions. [2019-11-06 19:15:22,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 19:15:22,006 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 342 [2019-11-06 19:15:22,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:22,019 INFO L225 Difference]: With dead ends: 6311 [2019-11-06 19:15:22,019 INFO L226 Difference]: Without dead ends: 3426 [2019-11-06 19:15:22,026 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:15:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2019-11-06 19:15:22,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 3382. [2019-11-06 19:15:22,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3382 states. [2019-11-06 19:15:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 3969 transitions. [2019-11-06 19:15:22,098 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 3969 transitions. Word has length 342 [2019-11-06 19:15:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:22,098 INFO L462 AbstractCegarLoop]: Abstraction has 3382 states and 3969 transitions. [2019-11-06 19:15:22,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:15:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 3969 transitions. [2019-11-06 19:15:22,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2019-11-06 19:15:22,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:22,113 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:22,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:22,317 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:22,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1281134373, now seen corresponding path program 1 times [2019-11-06 19:15:22,318 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:22,318 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011422368] [2019-11-06 19:15:22,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 477 proven. 112 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2019-11-06 19:15:23,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011422368] [2019-11-06 19:15:23,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867562207] [2019-11-06 19:15:23,759 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 [2019-11-06 19:15:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:23,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:15:23,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 822 proven. 2 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2019-11-06 19:15:24,158 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:24,158 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-11-06 19:15:24,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049688249] [2019-11-06 19:15:24,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 19:15:24,160 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:24,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 19:15:24,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:15:24,160 INFO L87 Difference]: Start difference. First operand 3382 states and 3969 transitions. Second operand 17 states.