/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/Problem15_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:15:36,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:15:36,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:15:36,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:15:36,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:15:36,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:15:36,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:15:36,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:15:36,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:15:36,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:15:36,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:15:36,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:15:36,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:15:36,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:15:36,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:15:36,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:15:36,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:15:36,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:15:36,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:15:36,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:15:36,577 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 19:15:36,591 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:15:36,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:15:36,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:15:36,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:15:36,592 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:15:36,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:15:36,593 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:15:36,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:15:36,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:15:36,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:15:36,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:15:36,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:15:36,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:15:36,594 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:15:36,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:15:36,595 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:15:36,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:15:36,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:15:36,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:15:36,595 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:15:36,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:15:36,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:15:36,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:15:36,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:15:36,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:15:36,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:15:36,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:15:36,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:15:36,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:15:36,886 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:15:36,899 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:15:36,902 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:15:36,904 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:15:36,904 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:15:36,905 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label28.c [2019-11-06 19:15:36,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2dcbd790/22bb8743320a4839a77f8f393c1e9dd8/FLAG13e760278 [2019-11-06 19:15:37,644 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:15:37,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label28.c [2019-11-06 19:15:37,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2dcbd790/22bb8743320a4839a77f8f393c1e9dd8/FLAG13e760278 [2019-11-06 19:15:37,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2dcbd790/22bb8743320a4839a77f8f393c1e9dd8 [2019-11-06 19:15:37,816 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:15:37,818 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:15:37,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:15:37,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:15:37,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:15:37,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:15:37" (1/1) ... [2019-11-06 19:15:37,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@630fa84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:37, skipping insertion in model container [2019-11-06 19:15:37,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:15:37" (1/1) ... [2019-11-06 19:15:37,836 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:15:37,925 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:15:38,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:15:38,863 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:15:39,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:15:39,156 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:15:39,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:39 WrapperNode [2019-11-06 19:15:39,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:15:39,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:15:39,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:15:39,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:15:39,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:39" (1/1) ... [2019-11-06 19:15:39,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:39" (1/1) ... [2019-11-06 19:15:39,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:39" (1/1) ... [2019-11-06 19:15:39,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:39" (1/1) ... [2019-11-06 19:15:39,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:39" (1/1) ... [2019-11-06 19:15:39,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:39" (1/1) ... [2019-11-06 19:15:39,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:39" (1/1) ... [2019-11-06 19:15:39,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:15:39,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:15:39,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:15:39,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:15:39,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:39" (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 19:15:39,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:15:39,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:15:39,462 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:15:39,462 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:15:39,463 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:15:39,464 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:15:39,464 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:15:39,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:15:39,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:15:39,465 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:15:39,465 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:15:39,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:15:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:15:43,396 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:15:43,396 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:15:43,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:43 BoogieIcfgContainer [2019-11-06 19:15:43,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:15:43,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:15:43,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:15:43,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:15:43,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:15:37" (1/3) ... [2019-11-06 19:15:43,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360b6be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:43, skipping insertion in model container [2019-11-06 19:15:43,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:39" (2/3) ... [2019-11-06 19:15:43,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360b6be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:43, skipping insertion in model container [2019-11-06 19:15:43,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:43" (3/3) ... [2019-11-06 19:15:43,423 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label28.c [2019-11-06 19:15:43,443 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:15:43,456 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:15:43,472 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:15:43,510 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:15:43,511 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:15:43,511 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:15:43,511 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:15:43,511 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:15:43,511 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:15:43,512 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:15:43,512 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:15:43,547 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 19:15:43,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 19:15:43,557 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:43,559 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] [2019-11-06 19:15:43,561 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:43,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:43,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1729511136, now seen corresponding path program 1 times [2019-11-06 19:15:43,581 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:43,581 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115310827] [2019-11-06 19:15:43,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:43,959 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 19:15:43,959 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115310827] [2019-11-06 19:15:43,960 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:43,960 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:15:43,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268577457] [2019-11-06 19:15:43,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:43,967 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:43,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:43,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:15:43,984 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-11-06 19:15:50,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:50,155 INFO L93 Difference]: Finished difference Result 1529 states and 2803 transitions. [2019-11-06 19:15:50,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:15:50,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2019-11-06 19:15:50,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:50,186 INFO L225 Difference]: With dead ends: 1529 [2019-11-06 19:15:50,186 INFO L226 Difference]: Without dead ends: 1024 [2019-11-06 19:15:50,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 3 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 19:15:50,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2019-11-06 19:15:50,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1016. [2019-11-06 19:15:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1016 states. [2019-11-06 19:15:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1541 transitions. [2019-11-06 19:15:50,315 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1541 transitions. Word has length 38 [2019-11-06 19:15:50,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:50,315 INFO L462 AbstractCegarLoop]: Abstraction has 1016 states and 1541 transitions. [2019-11-06 19:15:50,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:50,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1541 transitions. [2019-11-06 19:15:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-06 19:15:50,324 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:50,325 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:50,325 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:50,326 INFO L82 PathProgramCache]: Analyzing trace with hash 625871070, now seen corresponding path program 1 times [2019-11-06 19:15:50,326 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:50,326 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919366590] [2019-11-06 19:15:50,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:50,876 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919366590] [2019-11-06 19:15:50,876 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:50,876 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:15:50,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49915420] [2019-11-06 19:15:50,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:15:50,879 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:50,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:15:50,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:15:50,880 INFO L87 Difference]: Start difference. First operand 1016 states and 1541 transitions. Second operand 8 states. [2019-11-06 19:15:58,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:58,762 INFO L93 Difference]: Finished difference Result 3994 states and 6395 transitions. [2019-11-06 19:15:58,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:15:58,764 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 161 [2019-11-06 19:15:58,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:58,791 INFO L225 Difference]: With dead ends: 3994 [2019-11-06 19:15:58,791 INFO L226 Difference]: Without dead ends: 2984 [2019-11-06 19:15:58,797 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:15:58,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2019-11-06 19:15:58,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2934. [2019-11-06 19:15:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2934 states. [2019-11-06 19:15:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 3826 transitions. [2019-11-06 19:15:58,918 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 3826 transitions. Word has length 161 [2019-11-06 19:15:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:58,919 INFO L462 AbstractCegarLoop]: Abstraction has 2934 states and 3826 transitions. [2019-11-06 19:15:58,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:15:58,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 3826 transitions. [2019-11-06 19:15:58,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-11-06 19:15:58,925 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:58,925 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:15:58,926 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:58,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:58,926 INFO L82 PathProgramCache]: Analyzing trace with hash 420019932, now seen corresponding path program 1 times [2019-11-06 19:15:58,926 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:58,927 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381145231] [2019-11-06 19:15:58,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 63 proven. 89 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:15:59,548 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381145231] [2019-11-06 19:15:59,549 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051049849] [2019-11-06 19:15:59,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:59,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 19:15:59,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-06 19:15:59,947 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:59,951 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-11-06 19:15:59,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822508356] [2019-11-06 19:15:59,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 19:15:59,955 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:59,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 19:15:59,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:15:59,956 INFO L87 Difference]: Start difference. First operand 2934 states and 3826 transitions. Second operand 13 states.