/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/Problem10_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:04:37,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:04:37,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:04:37,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:04:37,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:04:37,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:04:37,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:04:37,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:04:37,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:04:37,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:04:37,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:04:37,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:04:37,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:04:37,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:04:37,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:04:37,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:04:37,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:04:37,917 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 19:04:37,937 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:04:37,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:04:37,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:04:37,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:04:37,940 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:04:37,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:04:37,940 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:04:37,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:04:37,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:04:37,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:04:37,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:04:37,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:04:37,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:04:37,943 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:04:37,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:04:37,943 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:04:37,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:04:37,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:04:37,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:04:37,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:04:37,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:04:37,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:04:37,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:04:37,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:04:37,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:04:37,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:04:37,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:04:37,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:04:37,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:04:38,233 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:04:38,255 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:04:38,259 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:04:38,261 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:04:38,261 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:04:38,262 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label11.c [2019-11-06 19:04:38,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb76c5272/c3f3a900c9334cdfba7047c2bd062b9c/FLAG99995ae10 [2019-11-06 19:04:38,956 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:04:38,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label11.c [2019-11-06 19:04:38,977 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb76c5272/c3f3a900c9334cdfba7047c2bd062b9c/FLAG99995ae10 [2019-11-06 19:04:39,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb76c5272/c3f3a900c9334cdfba7047c2bd062b9c [2019-11-06 19:04:39,203 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:04:39,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:04:39,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:04:39,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:04:39,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:04:39,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:39,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@318fff0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39, skipping insertion in model container [2019-11-06 19:04:39,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:39,221 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:04:39,274 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:04:39,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:04:39,811 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:04:39,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:04:39,950 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:04:39,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39 WrapperNode [2019-11-06 19:04:39,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:04:39,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:04:39,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:04:39,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:04:39,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:39,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:39,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:39,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:40,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:40,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:40,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:40,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:04:40,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:04:40,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:04:40,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:04:40,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (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 19:04:40,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:04:40,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:04:40,130 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:04:40,131 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:04:40,131 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:04:40,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:04:40,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:04:40,131 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:04:40,132 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:04:40,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:04:40,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:04:41,376 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:04:41,376 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:04:41,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:04:41 BoogieIcfgContainer [2019-11-06 19:04:41,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:04:41,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:04:41,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:04:41,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:04:41,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:04:39" (1/3) ... [2019-11-06 19:04:41,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1924c26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:04:41, skipping insertion in model container [2019-11-06 19:04:41,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (2/3) ... [2019-11-06 19:04:41,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1924c26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:04:41, skipping insertion in model container [2019-11-06 19:04:41,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:04:41" (3/3) ... [2019-11-06 19:04:41,386 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label11.c [2019-11-06 19:04:41,395 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:04:41,404 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:04:41,419 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:04:41,461 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:04:41,461 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:04:41,461 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:04:41,461 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:04:41,462 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:04:41,462 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:04:41,462 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:04:41,462 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:04:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 19:04:41,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-06 19:04:41,507 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:41,509 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, 1, 1, 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 19:04:41,511 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:41,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:41,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1918215546, now seen corresponding path program 1 times [2019-11-06 19:04:41,527 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:41,527 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75612225] [2019-11-06 19:04:41,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:41,885 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 19:04:41,886 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75612225] [2019-11-06 19:04:41,887 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:04:41,888 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:04:41,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036595745] [2019-11-06 19:04:41,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:04:41,896 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:41,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:04:41,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:04:41,913 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-11-06 19:04:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:44,078 INFO L93 Difference]: Finished difference Result 730 states and 1301 transitions. [2019-11-06 19:04:44,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:04:44,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2019-11-06 19:04:44,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:44,113 INFO L225 Difference]: With dead ends: 730 [2019-11-06 19:04:44,114 INFO L226 Difference]: Without dead ends: 447 [2019-11-06 19:04:44,127 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 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 19:04:44,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-11-06 19:04:44,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441. [2019-11-06 19:04:44,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-11-06 19:04:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 672 transitions. [2019-11-06 19:04:44,275 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 672 transitions. Word has length 67 [2019-11-06 19:04:44,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:44,276 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 672 transitions. [2019-11-06 19:04:44,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:04:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 672 transitions. [2019-11-06 19:04:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-06 19:04:44,294 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:44,295 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, 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] [2019-11-06 19:04:44,295 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:44,300 INFO L82 PathProgramCache]: Analyzing trace with hash 2016512505, now seen corresponding path program 1 times [2019-11-06 19:04:44,300 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:44,300 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238990944] [2019-11-06 19:04:44,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:44,702 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238990944] [2019-11-06 19:04:44,702 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362549026] [2019-11-06 19:04:44,702 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 19:04:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:44,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:04:44,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:04:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:44,920 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:04:44,920 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-11-06 19:04:44,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202323179] [2019-11-06 19:04:44,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:04:44,926 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:44,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:04:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:04:44,927 INFO L87 Difference]: Start difference. First operand 441 states and 672 transitions. Second operand 5 states. [2019-11-06 19:04:45,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:45,905 INFO L93 Difference]: Finished difference Result 1031 states and 1586 transitions. [2019-11-06 19:04:45,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:04:45,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2019-11-06 19:04:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:45,911 INFO L225 Difference]: With dead ends: 1031 [2019-11-06 19:04:45,911 INFO L226 Difference]: Without dead ends: 596 [2019-11-06 19:04:45,913 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:04:45,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2019-11-06 19:04:45,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 590. [2019-11-06 19:04:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-11-06 19:04:45,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 865 transitions. [2019-11-06 19:04:45,948 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 865 transitions. Word has length 186 [2019-11-06 19:04:45,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:45,952 INFO L462 AbstractCegarLoop]: Abstraction has 590 states and 865 transitions. [2019-11-06 19:04:45,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:04:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 865 transitions. [2019-11-06 19:04:45,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-06 19:04:45,960 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:45,960 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, 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] [2019-11-06 19:04:46,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:04:46,166 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:46,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:46,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1760446162, now seen corresponding path program 1 times [2019-11-06 19:04:46,167 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:46,167 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758903028] [2019-11-06 19:04:46,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:46,540 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758903028] [2019-11-06 19:04:46,541 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:04:46,541 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:04:46,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210894765] [2019-11-06 19:04:46,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:04:46,542 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:46,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:04:46,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:04:46,543 INFO L87 Difference]: Start difference. First operand 590 states and 865 transitions. Second operand 9 states. [2019-11-06 19:04:48,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:48,675 INFO L93 Difference]: Finished difference Result 1939 states and 3010 transitions. [2019-11-06 19:04:48,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:04:48,677 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 193 [2019-11-06 19:04:48,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:48,686 INFO L225 Difference]: With dead ends: 1939 [2019-11-06 19:04:48,686 INFO L226 Difference]: Without dead ends: 1355 [2019-11-06 19:04:48,688 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:04:48,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2019-11-06 19:04:48,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 894. [2019-11-06 19:04:48,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2019-11-06 19:04:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1190 transitions. [2019-11-06 19:04:48,730 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1190 transitions. Word has length 193 [2019-11-06 19:04:48,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:48,730 INFO L462 AbstractCegarLoop]: Abstraction has 894 states and 1190 transitions. [2019-11-06 19:04:48,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:04:48,731 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1190 transitions. [2019-11-06 19:04:48,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-11-06 19:04:48,735 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:48,736 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:04:48,736 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:48,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:48,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1807493347, now seen corresponding path program 1 times [2019-11-06 19:04:48,737 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:48,737 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969680070] [2019-11-06 19:04:48,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:04:49,260 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969680070] [2019-11-06 19:04:49,261 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091966348] [2019-11-06 19:04:49,261 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 19:04:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:49,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:04:49,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:04:49,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:04:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:49,474 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:04:49,474 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 15 [2019-11-06 19:04:49,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063845387] [2019-11-06 19:04:49,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 19:04:49,476 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:49,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 19:04:49,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:04:49,477 INFO L87 Difference]: Start difference. First operand 894 states and 1190 transitions. Second operand 15 states. [2019-11-06 19:04:52,299 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2019-11-06 19:04:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:54,215 INFO L93 Difference]: Finished difference Result 2114 states and 2917 transitions. [2019-11-06 19:04:54,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-06 19:04:54,216 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 256 [2019-11-06 19:04:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:54,226 INFO L225 Difference]: With dead ends: 2114 [2019-11-06 19:04:54,227 INFO L226 Difference]: Without dead ends: 1369 [2019-11-06 19:04:54,230 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2019-11-06 19:04:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2019-11-06 19:04:54,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1051. [2019-11-06 19:04:54,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2019-11-06 19:04:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1323 transitions. [2019-11-06 19:04:54,282 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1323 transitions. Word has length 256 [2019-11-06 19:04:54,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:54,284 INFO L462 AbstractCegarLoop]: Abstraction has 1051 states and 1323 transitions. [2019-11-06 19:04:54,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 19:04:54,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1323 transitions. [2019-11-06 19:04:54,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-11-06 19:04:54,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:54,290 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:04:54,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:04:54,501 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:54,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:54,502 INFO L82 PathProgramCache]: Analyzing trace with hash 854527778, now seen corresponding path program 1 times [2019-11-06 19:04:54,502 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:54,503 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725969994] [2019-11-06 19:04:54,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:04:54,839 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725969994] [2019-11-06 19:04:54,840 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685518263] [2019-11-06 19:04:54,840 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 19:04:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:54,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:04:54,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:04:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:55,177 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:04:55,177 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:04:55,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199079508] [2019-11-06 19:04:55,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:04:55,178 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:55,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:04:55,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:04:55,179 INFO L87 Difference]: Start difference. First operand 1051 states and 1323 transitions. Second operand 11 states. [2019-11-06 19:04:58,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:58,218 INFO L93 Difference]: Finished difference Result 3243 states and 4611 transitions. [2019-11-06 19:04:58,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 19:04:58,218 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 271 [2019-11-06 19:04:58,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:58,228 INFO L225 Difference]: With dead ends: 3243 [2019-11-06 19:04:58,228 INFO L226 Difference]: Without dead ends: 1258 [2019-11-06 19:04:58,236 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:04:58,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2019-11-06 19:04:58,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1228. [2019-11-06 19:04:58,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1228 states. [2019-11-06 19:04:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1503 transitions. [2019-11-06 19:04:58,296 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1503 transitions. Word has length 271 [2019-11-06 19:04:58,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:58,296 INFO L462 AbstractCegarLoop]: Abstraction has 1228 states and 1503 transitions. [2019-11-06 19:04:58,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:04:58,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1503 transitions. [2019-11-06 19:04:58,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-11-06 19:04:58,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:58,303 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:04:58,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:04:58,515 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:58,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:58,516 INFO L82 PathProgramCache]: Analyzing trace with hash -550746410, now seen corresponding path program 1 times [2019-11-06 19:04:58,516 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:58,517 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001285876] [2019-11-06 19:04:58,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 120 proven. 90 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:04:58,874 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001285876] [2019-11-06 19:04:58,874 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173443570] [2019-11-06 19:04:58,874 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 19:04:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:58,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:04:58,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:04:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-11-06 19:04:59,122 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:04:59,122 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:04:59,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347798472] [2019-11-06 19:04:59,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:04:59,123 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:59,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:04:59,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:04:59,123 INFO L87 Difference]: Start difference. First operand 1228 states and 1503 transitions. Second operand 5 states. [2019-11-06 19:05:00,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:05:00,037 INFO L93 Difference]: Finished difference Result 2281 states and 2775 transitions. [2019-11-06 19:05:00,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:05:00,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 281 [2019-11-06 19:05:00,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:05:00,043 INFO L225 Difference]: With dead ends: 2281 [2019-11-06 19:05:00,043 INFO L226 Difference]: Without dead ends: 1218 [2019-11-06 19:05:00,047 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:05:00,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2019-11-06 19:05:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1196. [2019-11-06 19:05:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1196 states. [2019-11-06 19:05:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1370 transitions. [2019-11-06 19:05:00,075 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1370 transitions. Word has length 281 [2019-11-06 19:05:00,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:05:00,075 INFO L462 AbstractCegarLoop]: Abstraction has 1196 states and 1370 transitions. [2019-11-06 19:05:00,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:05:00,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1370 transitions. [2019-11-06 19:05:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2019-11-06 19:05:00,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:05:00,083 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, 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, 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] [2019-11-06 19:05:00,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:05:00,291 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:05:00,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:05:00,292 INFO L82 PathProgramCache]: Analyzing trace with hash 348873925, now seen corresponding path program 1 times [2019-11-06 19:05:00,292 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:05:00,292 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690887801] [2019-11-06 19:05:00,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:05:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 305 proven. 71 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-06 19:05:01,766 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690887801] [2019-11-06 19:05:01,766 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605938294] [2019-11-06 19:05:01,766 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 19:05:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:01,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 19:05:01,895 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:05:01,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:01,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:01,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:01,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:01,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:01,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:01,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:01,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:08,665 WARN L191 SmtUtils]: Spent 6.63 s on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2019-11-06 19:05:08,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:05:08,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 386 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-11-06 19:05:09,054 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:05:09,054 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-06 19:05:09,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503231247] [2019-11-06 19:05:09,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 19:05:09,056 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:05:09,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 19:05:09,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2019-11-06 19:05:09,057 INFO L87 Difference]: Start difference. First operand 1196 states and 1370 transitions. Second operand 24 states. [2019-11-06 19:05:10,821 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54