/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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:21:42,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:21:42,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:21:42,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:21:42,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:21:42,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:21:42,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:21:42,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:21:42,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:21:42,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:21:42,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:21:42,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:21:42,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:21:42,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:21:42,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:21:42,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:21:42,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:21:42,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:21:42,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:21:42,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:21:42,205 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 19:21:42,228 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:21:42,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:21:42,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:21:42,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:21:42,231 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:21:42,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:21:42,232 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:21:42,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:21:42,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:21:42,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:21:42,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:21:42,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:21:42,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:21:42,233 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:21:42,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:21:42,233 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:21:42,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:21:42,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:21:42,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:21:42,235 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:21:42,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:21:42,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:21:42,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:21:42,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:21:42,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:21:42,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:21:42,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:21:42,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:21:42,239 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:21:42,510 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:21:42,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:21:42,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:21:42,538 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:21:42,538 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:21:42,539 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label54.c [2019-11-06 19:21:42,618 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bee5a3b6c/da6c580a618d448a9ec007d97e2ffc2b/FLAG7e88a74f1 [2019-11-06 19:21:43,385 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:21:43,386 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label54.c [2019-11-06 19:21:43,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bee5a3b6c/da6c580a618d448a9ec007d97e2ffc2b/FLAG7e88a74f1 [2019-11-06 19:21:43,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bee5a3b6c/da6c580a618d448a9ec007d97e2ffc2b [2019-11-06 19:21:43,541 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:21:43,544 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:21:43,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:21:43,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:21:43,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:21:43,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:21:43" (1/1) ... [2019-11-06 19:21:43,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e97d402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:43, skipping insertion in model container [2019-11-06 19:21:43,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:21:43" (1/1) ... [2019-11-06 19:21:43,560 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:21:43,671 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:21:44,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:21:44,812 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:21:45,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:21:45,375 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:21:45,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:45 WrapperNode [2019-11-06 19:21:45,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:21:45,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:21:45,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:21:45,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:21:45,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:45" (1/1) ... [2019-11-06 19:21:45,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:45" (1/1) ... [2019-11-06 19:21:45,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:45" (1/1) ... [2019-11-06 19:21:45,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:45" (1/1) ... [2019-11-06 19:21:45,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:45" (1/1) ... [2019-11-06 19:21:45,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:45" (1/1) ... [2019-11-06 19:21:45,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:45" (1/1) ... [2019-11-06 19:21:45,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:21:45,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:21:45,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:21:45,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:21:45,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:45" (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 19:21:45,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:21:45,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:21:45,764 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:21:45,765 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:21:45,765 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:21:45,765 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:21:45,765 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:21:45,765 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:21:45,765 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:21:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:21:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:21:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:21:45,767 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:21:45,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:21:45,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:21:49,722 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:21:49,722 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:21:49,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:21:49 BoogieIcfgContainer [2019-11-06 19:21:49,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:21:49,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:21:49,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:21:49,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:21:49,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:21:43" (1/3) ... [2019-11-06 19:21:49,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b378e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:21:49, skipping insertion in model container [2019-11-06 19:21:49,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:45" (2/3) ... [2019-11-06 19:21:49,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b378e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:21:49, skipping insertion in model container [2019-11-06 19:21:49,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:21:49" (3/3) ... [2019-11-06 19:21:49,744 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label54.c [2019-11-06 19:21:49,758 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:21:49,769 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:21:49,783 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:21:49,831 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:21:49,832 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:21:49,832 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:21:49,832 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:21:49,832 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:21:49,832 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:21:49,832 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:21:49,833 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:21:49,878 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 19:21:49,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 19:21:49,886 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:49,887 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] [2019-11-06 19:21:49,890 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:49,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:49,896 INFO L82 PathProgramCache]: Analyzing trace with hash 466768385, now seen corresponding path program 1 times [2019-11-06 19:21:49,906 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:49,907 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893200709] [2019-11-06 19:21:49,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:50,305 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 19:21:50,306 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893200709] [2019-11-06 19:21:50,307 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:21:50,307 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:21:50,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420996032] [2019-11-06 19:21:50,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:21:50,316 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:21:50,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:21:50,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:21:50,334 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-11-06 19:22:01,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:22:01,299 INFO L93 Difference]: Finished difference Result 3000 states and 5782 transitions. [2019-11-06 19:22:01,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:22:01,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2019-11-06 19:22:01,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:22:01,339 INFO L225 Difference]: With dead ends: 3000 [2019-11-06 19:22:01,339 INFO L226 Difference]: Without dead ends: 2142 [2019-11-06 19:22:01,349 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:22:01,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-11-06 19:22:01,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2138. [2019-11-06 19:22:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2138 states. [2019-11-06 19:22:01,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3501 transitions. [2019-11-06 19:22:01,532 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3501 transitions. Word has length 40 [2019-11-06 19:22:01,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:22:01,534 INFO L462 AbstractCegarLoop]: Abstraction has 2138 states and 3501 transitions. [2019-11-06 19:22:01,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:22:01,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3501 transitions. [2019-11-06 19:22:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-06 19:22:01,550 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:22:01,551 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:22:01,552 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:22:01,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:22:01,552 INFO L82 PathProgramCache]: Analyzing trace with hash 653681341, now seen corresponding path program 1 times [2019-11-06 19:22:01,552 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:22:01,553 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455962359] [2019-11-06 19:22:01,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:22:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:22:01,839 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455962359] [2019-11-06 19:22:01,839 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:22:01,839 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:22:01,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697372862] [2019-11-06 19:22:01,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:22:01,845 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:22:01,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:22:01,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:22:01,847 INFO L87 Difference]: Start difference. First operand 2138 states and 3501 transitions. Second operand 8 states. [2019-11-06 19:22:12,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:22:12,817 INFO L93 Difference]: Finished difference Result 8664 states and 14432 transitions. [2019-11-06 19:22:12,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:22:12,817 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2019-11-06 19:22:12,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:22:12,859 INFO L225 Difference]: With dead ends: 8664 [2019-11-06 19:22:12,859 INFO L226 Difference]: Without dead ends: 6532 [2019-11-06 19:22:12,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:22:12,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6532 states. [2019-11-06 19:22:13,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6532 to 6511. [2019-11-06 19:22:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6511 states. [2019-11-06 19:22:13,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6511 states to 6511 states and 9250 transitions. [2019-11-06 19:22:13,069 INFO L78 Accepts]: Start accepts. Automaton has 6511 states and 9250 transitions. Word has length 109 [2019-11-06 19:22:13,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:22:13,072 INFO L462 AbstractCegarLoop]: Abstraction has 6511 states and 9250 transitions. [2019-11-06 19:22:13,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:22:13,072 INFO L276 IsEmpty]: Start isEmpty. Operand 6511 states and 9250 transitions. [2019-11-06 19:22:13,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-11-06 19:22:13,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:22:13,087 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:22:13,088 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:22:13,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:22:13,089 INFO L82 PathProgramCache]: Analyzing trace with hash 967007739, now seen corresponding path program 1 times [2019-11-06 19:22:13,089 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:22:13,090 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036666397] [2019-11-06 19:22:13,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:22:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:22:13,639 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036666397] [2019-11-06 19:22:13,639 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814411117] [2019-11-06 19:22:13,639 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 19:22:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:13,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:22:13,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:22:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 160 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:22:13,898 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:22:13,898 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:22:13,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188143119] [2019-11-06 19:22:13,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:22:13,900 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:22:13,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:22:13,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:22:13,901 INFO L87 Difference]: Start difference. First operand 6511 states and 9250 transitions. Second operand 11 states.