/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_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:16:11,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:16:11,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:16:11,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:16:11,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:16:11,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:16:11,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:16:11,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:16:11,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:16:11,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:16:11,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:16:11,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:16:11,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:16:11,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:16:11,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:16:11,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:16:11,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:16:11,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:16:11,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:16:11,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:16:11,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:16:11,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:16:11,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:16:11,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:16:11,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:16:11,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:16:11,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:16:11,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:16:11,972 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 19:16:12,010 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:16:12,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:16:12,011 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:16:12,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:16:12,012 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:16:12,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:16:12,012 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:16:12,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:16:12,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:16:12,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:16:12,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:16:12,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:16:12,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:16:12,016 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:16:12,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:16:12,016 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:16:12,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:16:12,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:16:12,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:16:12,017 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:16:12,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:16:12,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:16:12,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:16:12,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:16:12,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:16:12,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:16:12,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:16:12,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:16:12,019 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:16:12,309 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:16:12,329 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:16:12,333 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:16:12,336 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:16:12,337 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:16:12,337 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label35.c [2019-11-06 19:16:12,411 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e0cb0201/025c6c93c088411290aebb4fc08e8e8d/FLAG4938cc8fd [2019-11-06 19:16:13,046 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:16:13,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label35.c [2019-11-06 19:16:13,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e0cb0201/025c6c93c088411290aebb4fc08e8e8d/FLAG4938cc8fd [2019-11-06 19:16:13,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e0cb0201/025c6c93c088411290aebb4fc08e8e8d [2019-11-06 19:16:13,290 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:16:13,291 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:16:13,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:16:13,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:16:13,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:16:13,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:16:13" (1/1) ... [2019-11-06 19:16:13,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e31c226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:13, skipping insertion in model container [2019-11-06 19:16:13,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:16:13" (1/1) ... [2019-11-06 19:16:13,309 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:16:13,407 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:16:14,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:16:14,301 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:16:14,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:16:14,760 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:16:14,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:14 WrapperNode [2019-11-06 19:16:14,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:16:14,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:16:14,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:16:14,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:16:14,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:14" (1/1) ... [2019-11-06 19:16:14,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:14" (1/1) ... [2019-11-06 19:16:14,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:14" (1/1) ... [2019-11-06 19:16:14,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:14" (1/1) ... [2019-11-06 19:16:14,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:14" (1/1) ... [2019-11-06 19:16:14,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:14" (1/1) ... [2019-11-06 19:16:14,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:14" (1/1) ... [2019-11-06 19:16:14,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:16:14,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:16:14,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:16:14,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:16:14,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:14" (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 19:16:15,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:16:15,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:16:15,025 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:16:15,026 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:16:15,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:16:15,026 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:16:15,026 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:16:15,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:16:15,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:16:15,027 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:16:15,027 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:16:15,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:16:15,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:16:18,465 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:16:18,466 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:16:18,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:16:18 BoogieIcfgContainer [2019-11-06 19:16:18,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:16:18,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:16:18,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:16:18,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:16:18,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:16:13" (1/3) ... [2019-11-06 19:16:18,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b064680 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:16:18, skipping insertion in model container [2019-11-06 19:16:18,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:14" (2/3) ... [2019-11-06 19:16:18,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b064680 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:16:18, skipping insertion in model container [2019-11-06 19:16:18,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:16:18" (3/3) ... [2019-11-06 19:16:18,484 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label35.c [2019-11-06 19:16:18,498 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:16:18,508 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:16:18,521 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:16:18,565 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:16:18,566 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:16:18,567 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:16:18,567 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:16:18,567 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:16:18,567 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:16:18,567 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:16:18,567 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:16:18,602 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 19:16:18,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 19:16:18,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:18,611 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] [2019-11-06 19:16:18,613 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:18,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:18,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1512840592, now seen corresponding path program 1 times [2019-11-06 19:16:18,630 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:18,631 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720904881] [2019-11-06 19:16:18,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:19,102 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 19:16:19,103 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720904881] [2019-11-06 19:16:19,104 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:16:19,104 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:16:19,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607317330] [2019-11-06 19:16:19,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:16:19,112 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:19,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:16:19,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:16:19,129 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-11-06 19:16:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:25,625 INFO L93 Difference]: Finished difference Result 1575 states and 2878 transitions. [2019-11-06 19:16:25,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:16:25,627 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-11-06 19:16:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:25,661 INFO L225 Difference]: With dead ends: 1575 [2019-11-06 19:16:25,662 INFO L226 Difference]: Without dead ends: 1055 [2019-11-06 19:16:25,670 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 19:16:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2019-11-06 19:16:25,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1024. [2019-11-06 19:16:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2019-11-06 19:16:25,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1749 transitions. [2019-11-06 19:16:25,815 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1749 transitions. Word has length 42 [2019-11-06 19:16:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:25,817 INFO L462 AbstractCegarLoop]: Abstraction has 1024 states and 1749 transitions. [2019-11-06 19:16:25,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:16:25,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1749 transitions. [2019-11-06 19:16:25,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-06 19:16:25,827 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:25,828 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:16:25,828 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:25,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:25,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1983802676, now seen corresponding path program 1 times [2019-11-06 19:16:25,830 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:25,830 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738449683] [2019-11-06 19:16:25,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:26,199 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738449683] [2019-11-06 19:16:26,199 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415931095] [2019-11-06 19:16:26,200 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 19:16:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:26,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:16:26,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:26,350 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:16:26,351 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:16:26,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710449856] [2019-11-06 19:16:26,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:16:26,353 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:26,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:16:26,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:26,354 INFO L87 Difference]: Start difference. First operand 1024 states and 1749 transitions. Second operand 3 states. [2019-11-06 19:16:29,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:29,052 INFO L93 Difference]: Finished difference Result 2976 states and 5156 transitions. [2019-11-06 19:16:29,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:16:29,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2019-11-06 19:16:29,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:29,064 INFO L225 Difference]: With dead ends: 2976 [2019-11-06 19:16:29,064 INFO L226 Difference]: Without dead ends: 1958 [2019-11-06 19:16:29,068 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:29,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2019-11-06 19:16:29,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1955. [2019-11-06 19:16:29,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1955 states. [2019-11-06 19:16:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2868 transitions. [2019-11-06 19:16:29,140 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 2868 transitions. Word has length 111 [2019-11-06 19:16:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:29,141 INFO L462 AbstractCegarLoop]: Abstraction has 1955 states and 2868 transitions. [2019-11-06 19:16:29,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:16:29,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 2868 transitions. [2019-11-06 19:16:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 19:16:29,144 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:29,145 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:16:29,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:29,358 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:29,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:29,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1476577176, now seen corresponding path program 1 times [2019-11-06 19:16:29,358 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:29,358 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600576319] [2019-11-06 19:16:29,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:29,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600576319] [2019-11-06 19:16:29,666 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:16:29,669 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:16:29,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080987511] [2019-11-06 19:16:29,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:16:29,672 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:29,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:16:29,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:16:29,672 INFO L87 Difference]: Start difference. First operand 1955 states and 2868 transitions. Second operand 8 states. [2019-11-06 19:16:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:35,439 INFO L93 Difference]: Finished difference Result 5861 states and 8774 transitions. [2019-11-06 19:16:35,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:16:35,441 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 128 [2019-11-06 19:16:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:35,466 INFO L225 Difference]: With dead ends: 5861 [2019-11-06 19:16:35,466 INFO L226 Difference]: Without dead ends: 3912 [2019-11-06 19:16:35,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:16:35,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2019-11-06 19:16:35,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 2934. [2019-11-06 19:16:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2934 states. [2019-11-06 19:16:35,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4016 transitions. [2019-11-06 19:16:35,575 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4016 transitions. Word has length 128 [2019-11-06 19:16:35,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:35,576 INFO L462 AbstractCegarLoop]: Abstraction has 2934 states and 4016 transitions. [2019-11-06 19:16:35,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:16:35,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4016 transitions. [2019-11-06 19:16:35,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2019-11-06 19:16:35,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:35,622 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:16:35,622 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:35,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:35,623 INFO L82 PathProgramCache]: Analyzing trace with hash -698668765, now seen corresponding path program 1 times [2019-11-06 19:16:35,623 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:35,623 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461364416] [2019-11-06 19:16:35,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:36,186 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461364416] [2019-11-06 19:16:36,186 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014388985] [2019-11-06 19:16:36,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:36,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:16:36,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:36,487 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:16:36,487 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:16:36,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998414768] [2019-11-06 19:16:36,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:16:36,490 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:36,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:16:36,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:36,490 INFO L87 Difference]: Start difference. First operand 2934 states and 4016 transitions. Second operand 3 states. [2019-11-06 19:16:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:38,696 INFO L93 Difference]: Finished difference Result 7426 states and 10578 transitions. [2019-11-06 19:16:38,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:16:38,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 316 [2019-11-06 19:16:38,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:38,723 INFO L225 Difference]: With dead ends: 7426 [2019-11-06 19:16:38,724 INFO L226 Difference]: Without dead ends: 4498 [2019-11-06 19:16:38,733 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:38,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4498 states. [2019-11-06 19:16:38,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4498 to 4495. [2019-11-06 19:16:38,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4495 states. [2019-11-06 19:16:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4495 states to 4495 states and 6012 transitions. [2019-11-06 19:16:38,865 INFO L78 Accepts]: Start accepts. Automaton has 4495 states and 6012 transitions. Word has length 316 [2019-11-06 19:16:38,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:38,867 INFO L462 AbstractCegarLoop]: Abstraction has 4495 states and 6012 transitions. [2019-11-06 19:16:38,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:16:38,867 INFO L276 IsEmpty]: Start isEmpty. Operand 4495 states and 6012 transitions. [2019-11-06 19:16:38,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2019-11-06 19:16:38,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:38,881 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:16:39,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:39,085 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:39,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:39,086 INFO L82 PathProgramCache]: Analyzing trace with hash -839432913, now seen corresponding path program 1 times [2019-11-06 19:16:39,086 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:39,086 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576280748] [2019-11-06 19:16:39,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 270 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-06 19:16:39,610 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576280748] [2019-11-06 19:16:39,610 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396582233] [2019-11-06 19:16:39,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:39,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:16:39,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 19:16:40,022 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:16:40,022 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:16:40,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60406787] [2019-11-06 19:16:40,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:16:40,024 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:40,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:16:40,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:16:40,025 INFO L87 Difference]: Start difference. First operand 4495 states and 6012 transitions. Second operand 11 states. [2019-11-06 19:16:51,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:51,882 INFO L93 Difference]: Finished difference Result 13394 states and 21471 transitions. [2019-11-06 19:16:51,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 19:16:51,883 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 408 [2019-11-06 19:16:51,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:51,945 INFO L225 Difference]: With dead ends: 13394 [2019-11-06 19:16:51,946 INFO L226 Difference]: Without dead ends: 8905 [2019-11-06 19:16:51,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 423 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2019-11-06 19:16:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8905 states.