/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/Problem18_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:20:25,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:20:25,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:20:25,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:20:25,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:20:25,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:20:25,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:20:25,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:20:25,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:20:25,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:20:25,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:20:25,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:20:25,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:20:25,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:20:25,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:20:25,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:20:25,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:20:25,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:20:25,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:20:25,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:20:25,468 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 19:20:25,482 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:20:25,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:20:25,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:20:25,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:20:25,484 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:20:25,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:20:25,484 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:20:25,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:20:25,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:20:25,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:20:25,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:20:25,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:20:25,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:20:25,486 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:20:25,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:20:25,486 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:20:25,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:20:25,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:20:25,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:20:25,487 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:20:25,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:20:25,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:20:25,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:20:25,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:20:25,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:20:25,488 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:20:25,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:20:25,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:20:25,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:20:25,804 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:20:25,828 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:20:25,832 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:20:25,833 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:20:25,834 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:20:25,835 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label23.c [2019-11-06 19:20:25,901 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18db07a31/c45c43c4b2c349419011033a239e5b96/FLAG5c3053f04 [2019-11-06 19:20:26,664 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:20:26,666 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label23.c [2019-11-06 19:20:26,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18db07a31/c45c43c4b2c349419011033a239e5b96/FLAG5c3053f04 [2019-11-06 19:20:27,189 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18db07a31/c45c43c4b2c349419011033a239e5b96 [2019-11-06 19:20:27,199 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:20:27,201 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:20:27,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:20:27,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:20:27,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:20:27,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:20:27" (1/1) ... [2019-11-06 19:20:27,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da2c6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:27, skipping insertion in model container [2019-11-06 19:20:27,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:20:27" (1/1) ... [2019-11-06 19:20:27,218 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:20:27,320 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:20:28,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:20:28,574 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:20:29,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:20:29,162 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:20:29,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29 WrapperNode [2019-11-06 19:20:29,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:20:29,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:20:29,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:20:29,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:20:29,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (1/1) ... [2019-11-06 19:20:29,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (1/1) ... [2019-11-06 19:20:29,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (1/1) ... [2019-11-06 19:20:29,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (1/1) ... [2019-11-06 19:20:29,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (1/1) ... [2019-11-06 19:20:29,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (1/1) ... [2019-11-06 19:20:29,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (1/1) ... [2019-11-06 19:20:29,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:20:29,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:20:29,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:20:29,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:20:29,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (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 19:20:29,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:20:29,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:20:29,482 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:20:29,483 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:20:29,483 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:20:29,483 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:20:29,483 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:20:29,483 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:20:29,484 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:20:29,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:20:29,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:20:29,484 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:20:29,485 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:20:29,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:20:29,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:20:33,496 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:20:33,496 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:20:33,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:20:33 BoogieIcfgContainer [2019-11-06 19:20:33,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:20:33,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:20:33,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:20:33,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:20:33,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:20:27" (1/3) ... [2019-11-06 19:20:33,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@943aec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:20:33, skipping insertion in model container [2019-11-06 19:20:33,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (2/3) ... [2019-11-06 19:20:33,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@943aec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:20:33, skipping insertion in model container [2019-11-06 19:20:33,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:20:33" (3/3) ... [2019-11-06 19:20:33,510 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label23.c [2019-11-06 19:20:33,520 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:20:33,530 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:20:33,542 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:20:33,594 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:20:33,595 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:20:33,595 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:20:33,595 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:20:33,595 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:20:33,596 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:20:33,596 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:20:33,596 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:20:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 19:20:33,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 19:20:33,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:33,656 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] [2019-11-06 19:20:33,658 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:33,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:33,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1957259726, now seen corresponding path program 1 times [2019-11-06 19:20:33,675 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:33,676 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405700082] [2019-11-06 19:20:33,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:34,119 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 19:20:34,120 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405700082] [2019-11-06 19:20:34,121 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:20:34,121 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:20:34,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908521570] [2019-11-06 19:20:34,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:20:34,128 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:34,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:20:34,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:20:34,146 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-11-06 19:20:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:43,650 INFO L93 Difference]: Finished difference Result 2984 states and 5769 transitions. [2019-11-06 19:20:43,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:20:43,652 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-11-06 19:20:43,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:43,691 INFO L225 Difference]: With dead ends: 2984 [2019-11-06 19:20:43,691 INFO L226 Difference]: Without dead ends: 2142 [2019-11-06 19:20:43,701 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:20:43,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-11-06 19:20:43,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2135. [2019-11-06 19:20:43,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2135 states. [2019-11-06 19:20:43,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 3571 transitions. [2019-11-06 19:20:43,884 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 3571 transitions. Word has length 61 [2019-11-06 19:20:43,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:43,885 INFO L462 AbstractCegarLoop]: Abstraction has 2135 states and 3571 transitions. [2019-11-06 19:20:43,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:20:43,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 3571 transitions. [2019-11-06 19:20:43,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 19:20:43,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:43,908 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, 1, 1, 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 19:20:43,908 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:43,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:43,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2051582907, now seen corresponding path program 1 times [2019-11-06 19:20:43,909 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:43,909 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891885487] [2019-11-06 19:20:43,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:44,202 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891885487] [2019-11-06 19:20:44,202 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:20:44,203 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:20:44,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789696428] [2019-11-06 19:20:44,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:20:44,208 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:44,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:20:44,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:20:44,210 INFO L87 Difference]: Start difference. First operand 2135 states and 3571 transitions. Second operand 8 states. [2019-11-06 19:20:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:51,440 INFO L93 Difference]: Finished difference Result 5045 states and 8285 transitions. [2019-11-06 19:20:51,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:20:51,440 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 132 [2019-11-06 19:20:51,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:51,458 INFO L225 Difference]: With dead ends: 5045 [2019-11-06 19:20:51,458 INFO L226 Difference]: Without dead ends: 2916 [2019-11-06 19:20:51,464 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:20:51,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2019-11-06 19:20:51,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 2879. [2019-11-06 19:20:51,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2879 states. [2019-11-06 19:20:51,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 4328 transitions. [2019-11-06 19:20:51,548 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 4328 transitions. Word has length 132 [2019-11-06 19:20:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:51,549 INFO L462 AbstractCegarLoop]: Abstraction has 2879 states and 4328 transitions. [2019-11-06 19:20:51,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:20:51,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 4328 transitions. [2019-11-06 19:20:51,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-11-06 19:20:51,554 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:51,555 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:51,555 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:51,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:51,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1065089558, now seen corresponding path program 1 times [2019-11-06 19:20:51,559 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:51,561 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671299063] [2019-11-06 19:20:51,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:52,023 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671299063] [2019-11-06 19:20:52,023 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:20:52,023 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:20:52,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665459233] [2019-11-06 19:20:52,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:20:52,025 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:52,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:20:52,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:20:52,026 INFO L87 Difference]: Start difference. First operand 2879 states and 4328 transitions. Second operand 9 states. [2019-11-06 19:21:01,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:21:01,878 INFO L93 Difference]: Finished difference Result 10953 states and 16883 transitions. [2019-11-06 19:21:01,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:21:01,880 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 211 [2019-11-06 19:21:01,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:21:01,919 INFO L225 Difference]: With dead ends: 10953 [2019-11-06 19:21:01,920 INFO L226 Difference]: Without dead ends: 8080 [2019-11-06 19:21:01,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:21:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8080 states. [2019-11-06 19:21:02,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8080 to 7316. [2019-11-06 19:21:02,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7316 states. [2019-11-06 19:21:02,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7316 states to 7316 states and 9898 transitions. [2019-11-06 19:21:02,144 INFO L78 Accepts]: Start accepts. Automaton has 7316 states and 9898 transitions. Word has length 211 [2019-11-06 19:21:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:21:02,147 INFO L462 AbstractCegarLoop]: Abstraction has 7316 states and 9898 transitions. [2019-11-06 19:21:02,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:21:02,147 INFO L276 IsEmpty]: Start isEmpty. Operand 7316 states and 9898 transitions. [2019-11-06 19:21:02,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-11-06 19:21:02,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:02,152 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, 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] [2019-11-06 19:21:02,152 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:02,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:02,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1362369649, now seen corresponding path program 1 times [2019-11-06 19:21:02,153 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:02,153 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813136] [2019-11-06 19:21:02,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:21:02,448 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813136] [2019-11-06 19:21:02,448 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952414302] [2019-11-06 19:21:02,449 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 19:21:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:02,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:21:02,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:21:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 19:21:02,709 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:21:02,709 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2019-11-06 19:21:02,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311696704] [2019-11-06 19:21:02,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:21:02,710 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:21:02,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:21:02,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:21:02,711 INFO L87 Difference]: Start difference. First operand 7316 states and 9898 transitions. Second operand 5 states.