/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_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:21:06,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:21:06,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:21:06,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:21:06,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:21:06,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:21:06,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:21:06,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:21:06,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:21:06,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:21:06,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:21:06,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:21:06,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:21:06,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:21:06,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:21:06,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:21:06,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:21:06,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:21:06,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:21:06,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:21:06,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:21:06,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:21:06,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:21:06,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:21:06,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:21:06,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:21:06,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:21:06,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:21:06,757 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:21:06,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:21:06,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:21:06,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:21:06,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:21:06,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:21:06,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:21:06,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:21:06,771 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:21:06,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:21:06,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:21:06,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:21:06,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:21:06,778 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 19:21:06,799 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:21:06,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:21:06,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:21:06,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:21:06,803 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:21:06,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:21:06,803 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:21:06,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:21:06,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:21:06,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:21:06,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:21:06,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:21:06,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:21:06,805 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:21:06,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:21:06,805 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:21:06,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:21:06,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:21:06,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:21:06,806 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:21:06,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:21:06,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:21:06,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:21:06,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:21:06,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:21:06,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:21:06,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:21:06,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:21:06,808 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:21:07,077 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:21:07,089 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:21:07,093 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:21:07,094 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:21:07,095 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:21:07,095 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label42.c [2019-11-06 19:21:07,174 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39558d418/9fbbf182c53743e3879f48bc00f880a6/FLAG149f46415 [2019-11-06 19:21:07,915 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:21:07,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label42.c [2019-11-06 19:21:07,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39558d418/9fbbf182c53743e3879f48bc00f880a6/FLAG149f46415 [2019-11-06 19:21:08,077 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39558d418/9fbbf182c53743e3879f48bc00f880a6 [2019-11-06 19:21:08,088 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:21:08,089 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:21:08,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:21:08,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:21:08,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:21:08,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:21:08" (1/1) ... [2019-11-06 19:21:08,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19c3612a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:08, skipping insertion in model container [2019-11-06 19:21:08,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:21:08" (1/1) ... [2019-11-06 19:21:08,107 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:21:08,230 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:21:09,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:21:09,413 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:21:09,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:21:09,905 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:21:09,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:09 WrapperNode [2019-11-06 19:21:09,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:21:09,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:21:09,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:21:09,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:21:09,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:09" (1/1) ... [2019-11-06 19:21:09,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:09" (1/1) ... [2019-11-06 19:21:09,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:09" (1/1) ... [2019-11-06 19:21:09,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:09" (1/1) ... [2019-11-06 19:21:10,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:09" (1/1) ... [2019-11-06 19:21:10,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:09" (1/1) ... [2019-11-06 19:21:10,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:09" (1/1) ... [2019-11-06 19:21:10,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:21:10,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:21:10,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:21:10,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:21:10,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:09" (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 19:21:10,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:21:10,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:21:10,233 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:21:10,233 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:21:10,233 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:21:10,233 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:21:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:21:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:21:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:21:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:21:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:21:10,235 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:21:10,236 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:21:10,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:21:10,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:21:14,278 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:21:14,279 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:21:14,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:21:14 BoogieIcfgContainer [2019-11-06 19:21:14,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:21:14,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:21:14,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:21:14,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:21:14,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:21:08" (1/3) ... [2019-11-06 19:21:14,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280ea35a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:21:14, skipping insertion in model container [2019-11-06 19:21:14,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:09" (2/3) ... [2019-11-06 19:21:14,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280ea35a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:21:14, skipping insertion in model container [2019-11-06 19:21:14,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:21:14" (3/3) ... [2019-11-06 19:21:14,288 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label42.c [2019-11-06 19:21:14,298 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:21:14,308 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:21:14,320 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:21:14,355 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:21:14,355 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:21:14,356 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:21:14,356 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:21:14,356 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:21:14,356 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:21:14,356 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:21:14,356 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:21:14,389 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 19:21:14,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 19:21:14,399 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:14,400 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:21:14,402 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:14,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:14,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1002146950, now seen corresponding path program 1 times [2019-11-06 19:21:14,418 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:14,419 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047119719] [2019-11-06 19:21:14,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:14,875 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 19:21:14,876 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047119719] [2019-11-06 19:21:14,877 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:21:14,877 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:21:14,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226746123] [2019-11-06 19:21:14,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:21:14,885 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:21:14,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:21:14,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:21:14,903 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-11-06 19:21:24,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:21:24,130 INFO L93 Difference]: Finished difference Result 2984 states and 5770 transitions. [2019-11-06 19:21:24,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:21:24,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2019-11-06 19:21:24,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:21:24,165 INFO L225 Difference]: With dead ends: 2984 [2019-11-06 19:21:24,166 INFO L226 Difference]: Without dead ends: 2142 [2019-11-06 19:21:24,179 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:21:24,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-11-06 19:21:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2132. [2019-11-06 19:21:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2132 states. [2019-11-06 19:21:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3753 transitions. [2019-11-06 19:21:24,338 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3753 transitions. Word has length 55 [2019-11-06 19:21:24,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:21:24,339 INFO L462 AbstractCegarLoop]: Abstraction has 2132 states and 3753 transitions. [2019-11-06 19:21:24,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:21:24,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3753 transitions. [2019-11-06 19:21:24,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-06 19:21:24,346 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:24,347 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:21:24,347 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:24,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:24,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1451433186, now seen corresponding path program 1 times [2019-11-06 19:21:24,348 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:24,348 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411426954] [2019-11-06 19:21:24,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:21:24,702 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411426954] [2019-11-06 19:21:24,703 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:21:24,703 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:21:24,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094650227] [2019-11-06 19:21:24,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:21:24,709 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:21:24,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:21:24,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:21:24,710 INFO L87 Difference]: Start difference. First operand 2132 states and 3753 transitions. Second operand 9 states. [2019-11-06 19:21:35,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:21:35,332 INFO L93 Difference]: Finished difference Result 8649 states and 15485 transitions. [2019-11-06 19:21:35,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:21:35,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 143 [2019-11-06 19:21:35,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:21:35,372 INFO L225 Difference]: With dead ends: 8649 [2019-11-06 19:21:35,373 INFO L226 Difference]: Without dead ends: 6523 [2019-11-06 19:21:35,381 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:21:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6523 states. [2019-11-06 19:21:35,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6523 to 6502. [2019-11-06 19:21:35,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6502 states. [2019-11-06 19:21:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6502 states to 6502 states and 9753 transitions. [2019-11-06 19:21:35,614 INFO L78 Accepts]: Start accepts. Automaton has 6502 states and 9753 transitions. Word has length 143 [2019-11-06 19:21:35,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:21:35,618 INFO L462 AbstractCegarLoop]: Abstraction has 6502 states and 9753 transitions. [2019-11-06 19:21:35,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:21:35,618 INFO L276 IsEmpty]: Start isEmpty. Operand 6502 states and 9753 transitions. [2019-11-06 19:21:35,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 19:21:35,631 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:35,632 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:21:35,632 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:35,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:35,633 INFO L82 PathProgramCache]: Analyzing trace with hash 163779891, now seen corresponding path program 1 times [2019-11-06 19:21:35,634 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:35,634 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478176913] [2019-11-06 19:21:35,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:21:35,890 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478176913] [2019-11-06 19:21:35,890 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836123756] [2019-11-06 19:21:35,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:21:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:35,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:21:35,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:21:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:21:36,066 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:21:36,067 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2019-11-06 19:21:36,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705446220] [2019-11-06 19:21:36,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:21:36,070 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:21:36,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:21:36,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:21:36,078 INFO L87 Difference]: Start difference. First operand 6502 states and 9753 transitions. Second operand 3 states. [2019-11-06 19:21:39,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:21:39,737 INFO L93 Difference]: Finished difference Result 17267 states and 25492 transitions. [2019-11-06 19:21:39,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:21:39,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 166 [2019-11-06 19:21:39,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:21:39,798 INFO L225 Difference]: With dead ends: 17267 [2019-11-06 19:21:39,798 INFO L226 Difference]: Without dead ends: 10771 [2019-11-06 19:21:39,816 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:21:39,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10771 states. [2019-11-06 19:21:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10771 to 9360. [2019-11-06 19:21:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9360 states. [2019-11-06 19:21:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9360 states to 9360 states and 13070 transitions. [2019-11-06 19:21:40,047 INFO L78 Accepts]: Start accepts. Automaton has 9360 states and 13070 transitions. Word has length 166 [2019-11-06 19:21:40,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:21:40,048 INFO L462 AbstractCegarLoop]: Abstraction has 9360 states and 13070 transitions. [2019-11-06 19:21:40,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:21:40,049 INFO L276 IsEmpty]: Start isEmpty. Operand 9360 states and 13070 transitions. [2019-11-06 19:21:40,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-11-06 19:21:40,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:40,053 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2019-11-06 19:21:40,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:21:40,256 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:40,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:40,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1669578515, now seen corresponding path program 1 times [2019-11-06 19:21:40,258 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:40,258 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084818467] [2019-11-06 19:21:40,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 96 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:21:40,601 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084818467] [2019-11-06 19:21:40,601 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98872270] [2019-11-06 19:21:40,601 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 19:21:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:40,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:21:40,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:21:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-06 19:21:40,917 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:21:40,918 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:21:40,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996961822] [2019-11-06 19:21:40,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:21:40,919 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:21:40,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:21:40,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:21:40,920 INFO L87 Difference]: Start difference. First operand 9360 states and 13070 transitions. Second operand 5 states.