/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 13:43:34,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 13:43:34,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 13:43:34,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 13:43:34,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 13:43:34,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 13:43:34,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 13:43:34,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 13:43:34,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 13:43:34,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 13:43:34,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 13:43:34,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 13:43:34,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 13:43:34,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 13:43:34,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 13:43:34,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 13:43:34,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 13:43:34,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 13:43:34,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 13:43:34,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 13:43:34,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 13:43:34,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 13:43:34,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 13:43:34,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 13:43:34,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 13:43:34,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 13:43:34,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 13:43:34,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 13:43:34,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 13:43:34,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 13:43:34,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 13:43:34,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 13:43:34,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 13:43:34,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 13:43:34,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 13:43:34,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 13:43:34,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 13:43:34,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 13:43:34,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 13:43:34,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 13:43:34,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 13:43:34,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 13:43:34,605 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 13:43:34,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 13:43:34,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 13:43:34,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 13:43:34,609 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 13:43:34,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 13:43:34,610 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 13:43:34,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 13:43:34,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 13:43:34,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 13:43:34,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 13:43:34,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 13:43:34,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 13:43:34,611 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 13:43:34,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 13:43:34,611 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 13:43:34,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 13:43:34,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 13:43:34,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 13:43:34,614 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 13:43:34,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 13:43:34,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 13:43:34,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 13:43:34,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 13:43:34,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 13:43:34,616 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 13:43:34,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 13:43:34,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 13:43:34,616 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 13:43:34,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 13:43:34,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 13:43:34,961 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 13:43:34,965 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 13:43:34,967 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 13:43:34,968 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 13:43:34,969 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label38.c [2020-10-12 13:43:35,054 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b823232e/fb47e078d83a4711bca7e789268b2434/FLAG8e09334fd [2020-10-12 13:43:35,964 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 13:43:35,967 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label38.c [2020-10-12 13:43:36,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b823232e/fb47e078d83a4711bca7e789268b2434/FLAG8e09334fd [2020-10-12 13:43:36,396 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b823232e/fb47e078d83a4711bca7e789268b2434 [2020-10-12 13:43:36,408 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 13:43:36,410 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 13:43:36,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 13:43:36,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 13:43:36,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 13:43:36,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 01:43:36" (1/1) ... [2020-10-12 13:43:36,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bbd4707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:43:36, skipping insertion in model container [2020-10-12 13:43:36,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 01:43:36" (1/1) ... [2020-10-12 13:43:36,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 13:43:36,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 13:43:38,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 13:43:38,570 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 13:43:39,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 13:43:39,540 INFO L208 MainTranslator]: Completed translation [2020-10-12 13:43:39,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:43:39 WrapperNode [2020-10-12 13:43:39,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 13:43:39,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 13:43:39,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 13:43:39,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 13:43:39,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:43:39" (1/1) ... [2020-10-12 13:43:39,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:43:39" (1/1) ... [2020-10-12 13:43:39,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:43:39" (1/1) ... [2020-10-12 13:43:39,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:43:39" (1/1) ... [2020-10-12 13:43:39,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:43:39" (1/1) ... [2020-10-12 13:43:39,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:43:39" (1/1) ... [2020-10-12 13:43:39,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:43:39" (1/1) ... [2020-10-12 13:43:39,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 13:43:39,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 13:43:39,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 13:43:39,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 13:43:39,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:43:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-12 13:43:40,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 13:43:40,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 13:43:40,063 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-12 13:43:40,063 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-12 13:43:40,064 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-12 13:43:40,064 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-12 13:43:40,064 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 13:43:40,065 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-12 13:43:40,065 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-12 13:43:40,066 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-12 13:43:40,066 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-12 13:43:40,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 13:43:40,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 13:43:40,067 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 13:43:40,067 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 13:43:40,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 13:43:40,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 13:43:52,675 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 13:43:52,676 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 13:43:52,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 01:43:52 BoogieIcfgContainer [2020-10-12 13:43:52,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 13:43:52,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 13:43:52,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 13:43:52,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 13:43:52,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 01:43:36" (1/3) ... [2020-10-12 13:43:52,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ed620b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 01:43:52, skipping insertion in model container [2020-10-12 13:43:52,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:43:39" (2/3) ... [2020-10-12 13:43:52,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ed620b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 01:43:52, skipping insertion in model container [2020-10-12 13:43:52,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 01:43:52" (3/3) ... [2020-10-12 13:43:52,723 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label38.c [2020-10-12 13:43:52,736 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 13:43:52,748 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 13:43:52,765 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 13:43:52,802 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 13:43:52,803 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 13:43:52,803 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 13:43:52,803 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 13:43:52,803 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 13:43:52,803 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 13:43:52,804 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 13:43:52,804 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 13:43:52,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-12 13:43:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 13:43:52,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:43:52,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:43:52,869 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:43:52,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:43:52,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1954796256, now seen corresponding path program 1 times [2020-10-12 13:43:52,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:43:52,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560243811] [2020-10-12 13:43:52,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:43:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:43:53,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:53,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:43:53,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 13:43:53,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:43:53,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-12 13:43:53,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:43:53,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:43:53,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:43:53,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 13:43:53,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 13:43:53,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:43:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:43:53,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:43:53,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:43:53,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:43:53,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:43:53,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 13:43:53,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:43:53,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:43:53,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:43:53,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:43:53,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:43:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:43:53,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560243811] [2020-10-12 13:43:53,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:43:53,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 13:43:53,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141127767] [2020-10-12 13:43:53,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 13:43:53,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:43:53,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 13:43:53,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 13:43:53,907 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2020-10-12 13:44:12,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:44:12,475 INFO L93 Difference]: Finished difference Result 3204 states and 5913 transitions. [2020-10-12 13:44:12,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 13:44:12,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-12 13:44:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:44:12,511 INFO L225 Difference]: With dead ends: 3204 [2020-10-12 13:44:12,511 INFO L226 Difference]: Without dead ends: 2006 [2020-10-12 13:44:12,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 13:44:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2020-10-12 13:44:12,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1920. [2020-10-12 13:44:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1920 states. [2020-10-12 13:44:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 3311 transitions. [2020-10-12 13:44:12,745 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 3311 transitions. Word has length 65 [2020-10-12 13:44:12,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:44:12,748 INFO L479 AbstractCegarLoop]: Abstraction has 1920 states and 3311 transitions. [2020-10-12 13:44:12,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 13:44:12,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 3311 transitions. [2020-10-12 13:44:12,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-12 13:44:12,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:44:12,768 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:44:12,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 13:44:12,770 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:44:12,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:44:12,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1729921401, now seen corresponding path program 1 times [2020-10-12 13:44:12,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:44:12,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679370300] [2020-10-12 13:44:12,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:44:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:44:12,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:44:13,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:44:13,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:44:14,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:44:14,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-12 13:44:14,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:44:14,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2019 [2020-10-12 13:44:14,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:44:14,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:44:14,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:44:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 13:44:14,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 13:44:15,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:44:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:44:15,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:44:15,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:44:15,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:44:15,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:44:15,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 13:44:15,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:44:15,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:44:15,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:44:15,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:44:15,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 13:44:15,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:44:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:44:15,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:44:15,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:44:15,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 13:44:15,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:44:15,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-12 13:44:15,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:44:15,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:44:15,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:44:15,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 13:44:15,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:44:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:44:15,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679370300] [2020-10-12 13:44:15,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:44:15,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 13:44:15,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298752288] [2020-10-12 13:44:15,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 13:44:15,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:44:15,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 13:44:15,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-12 13:44:15,456 INFO L87 Difference]: Start difference. First operand 1920 states and 3311 transitions. Second operand 8 states. [2020-10-12 13:44:36,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:44:36,617 INFO L93 Difference]: Finished difference Result 7339 states and 12866 transitions. [2020-10-12 13:44:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 13:44:36,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2020-10-12 13:44:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:44:36,680 INFO L225 Difference]: With dead ends: 7339 [2020-10-12 13:44:36,681 INFO L226 Difference]: Without dead ends: 5425 [2020-10-12 13:44:36,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-12 13:44:36,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5425 states. [2020-10-12 13:44:36,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5425 to 5377. [2020-10-12 13:44:36,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5377 states. [2020-10-12 13:44:36,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5377 states to 5377 states and 8226 transitions. [2020-10-12 13:44:36,909 INFO L78 Accepts]: Start accepts. Automaton has 5377 states and 8226 transitions. Word has length 134 [2020-10-12 13:44:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:44:36,913 INFO L479 AbstractCegarLoop]: Abstraction has 5377 states and 8226 transitions. [2020-10-12 13:44:36,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 13:44:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 5377 states and 8226 transitions. [2020-10-12 13:44:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-12 13:44:36,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:44:36,919 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-12 13:44:36,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 13:44:36,920 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:44:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:44:36,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1732343715, now seen corresponding path program 1 times [2020-10-12 13:44:36,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:44:36,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844999162] [2020-10-12 13:44:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:44:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:44:36,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:44:37,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:44:38,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:44:38,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-12 13:44:38,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:44:38,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1093 [2020-10-12 13:44:38,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:44:38,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:44:38,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:44:38,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 13:44:38,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:44:38,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:44:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:44:38,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:44:38,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:44:38,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:44:38,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:44:38,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 13:44:38,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:44:38,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:44:38,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:44:38,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:44:38,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:44:38,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:44:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:44:38,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:44:38,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:44:38,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 13:44:38,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:44:38,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-12 13:44:38,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:44:38,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:44:38,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:44:38,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 13:44:38,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:44:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:44:38,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844999162] [2020-10-12 13:44:38,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:44:38,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 13:44:38,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258506278] [2020-10-12 13:44:38,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:44:38,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:44:38,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:44:38,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:44:38,496 INFO L87 Difference]: Start difference. First operand 5377 states and 8226 transitions. Second operand 7 states. [2020-10-12 13:45:03,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:45:03,252 INFO L93 Difference]: Finished difference Result 16025 states and 24918 transitions. [2020-10-12 13:45:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 13:45:03,255 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 136 [2020-10-12 13:45:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:45:03,321 INFO L225 Difference]: With dead ends: 16025 [2020-10-12 13:45:03,321 INFO L226 Difference]: Without dead ends: 10654 [2020-10-12 13:45:03,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-12 13:45:03,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10654 states. [2020-10-12 13:45:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10654 to 10439. [2020-10-12 13:45:03,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10439 states. [2020-10-12 13:45:03,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10439 states to 10439 states and 14154 transitions. [2020-10-12 13:45:03,796 INFO L78 Accepts]: Start accepts. Automaton has 10439 states and 14154 transitions. Word has length 136 [2020-10-12 13:45:03,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:45:03,799 INFO L479 AbstractCegarLoop]: Abstraction has 10439 states and 14154 transitions. [2020-10-12 13:45:03,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:45:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 10439 states and 14154 transitions. [2020-10-12 13:45:03,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-12 13:45:03,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:45:03,804 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-12 13:45:03,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 13:45:03,805 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:45:03,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:45:03,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1650321097, now seen corresponding path program 1 times [2020-10-12 13:45:03,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:45:03,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233860806] [2020-10-12 13:45:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:45:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:45:03,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:04,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:04,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:05,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:45:05,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-12 13:45:05,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:45:05,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1174 [2020-10-12 13:45:05,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:45:05,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 13:45:05,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:45:05,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-12 13:45:05,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:45:05,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:45:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:45:05,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:05,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:45:05,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:45:05,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:45:05,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 13:45:05,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:45:05,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:45:05,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:45:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:45:05,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:45:05,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:45:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:45:05,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:05,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:05,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:45:05,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 13:45:05,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:45:05,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-12 13:45:05,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:45:05,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:45:05,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:45:05,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 13:45:05,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:45:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 13:45:05,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233860806] [2020-10-12 13:45:05,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:45:05,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 13:45:05,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047246576] [2020-10-12 13:45:05,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 13:45:05,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:45:05,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 13:45:05,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 13:45:05,732 INFO L87 Difference]: Start difference. First operand 10439 states and 14154 transitions. Second operand 6 states. [2020-10-12 13:45:29,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:45:29,959 INFO L93 Difference]: Finished difference Result 28614 states and 40262 transitions. [2020-10-12 13:45:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 13:45:29,962 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2020-10-12 13:45:29,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:45:30,077 INFO L225 Difference]: With dead ends: 28614 [2020-10-12 13:45:30,077 INFO L226 Difference]: Without dead ends: 18181 [2020-10-12 13:45:30,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:45:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18181 states. [2020-10-12 13:45:30,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18181 to 18101. [2020-10-12 13:45:30,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18101 states. [2020-10-12 13:45:30,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18101 states to 18101 states and 23447 transitions. [2020-10-12 13:45:30,737 INFO L78 Accepts]: Start accepts. Automaton has 18101 states and 23447 transitions. Word has length 142 [2020-10-12 13:45:30,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:45:30,739 INFO L479 AbstractCegarLoop]: Abstraction has 18101 states and 23447 transitions. [2020-10-12 13:45:30,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 13:45:30,740 INFO L276 IsEmpty]: Start isEmpty. Operand 18101 states and 23447 transitions. [2020-10-12 13:45:30,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-12 13:45:30,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:45:30,746 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-12 13:45:30,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 13:45:30,747 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:45:30,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:45:30,747 INFO L82 PathProgramCache]: Analyzing trace with hash 190657184, now seen corresponding path program 1 times [2020-10-12 13:45:30,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:45:30,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456964747] [2020-10-12 13:45:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:45:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:45:30,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:30,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:31,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:35,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:45:35,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-12 13:45:35,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:45:35,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4354 [2020-10-12 13:45:35,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:45:35,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:45:35,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:45:35,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-12 13:45:35,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:45:35,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:45:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:45:35,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:35,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:45:35,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:45:35,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:45:35,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 13:45:35,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:45:35,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:45:35,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:45:35,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:45:35,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:45:35,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:45:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:45:35,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:35,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:45:35,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 13:45:35,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:45:35,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-12 13:45:35,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:45:35,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:45:35,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:45:35,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 13:45:35,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:45:35,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-12 13:45:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:45:35,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:35,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:45:35,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 13:45:35,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:45:35,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-12 13:45:35,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:45:35,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:45:35,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-12 13:45:35,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:45:35,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 13:45:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 116 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 13:45:35,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456964747] [2020-10-12 13:45:35,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:45:35,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 13:45:35,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720429213] [2020-10-12 13:45:35,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:45:35,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:45:35,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:45:35,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:45:35,897 INFO L87 Difference]: Start difference. First operand 18101 states and 23447 transitions. Second operand 7 states. [2020-10-12 13:45:55,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:45:55,511 INFO L93 Difference]: Finished difference Result 35793 states and 47007 transitions. [2020-10-12 13:45:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 13:45:55,515 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 235 [2020-10-12 13:45:55,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:45:55,595 INFO L225 Difference]: With dead ends: 35793 [2020-10-12 13:45:55,596 INFO L226 Difference]: Without dead ends: 18501 [2020-10-12 13:45:55,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-12 13:45:55,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18501 states. [2020-10-12 13:45:56,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18501 to 18232. [2020-10-12 13:45:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18232 states. [2020-10-12 13:45:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18232 states to 18232 states and 23710 transitions. [2020-10-12 13:45:56,137 INFO L78 Accepts]: Start accepts. Automaton has 18232 states and 23710 transitions. Word has length 235 [2020-10-12 13:45:56,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:45:56,137 INFO L479 AbstractCegarLoop]: Abstraction has 18232 states and 23710 transitions. [2020-10-12 13:45:56,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:45:56,138 INFO L276 IsEmpty]: Start isEmpty. Operand 18232 states and 23710 transitions. [2020-10-12 13:45:56,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-12 13:45:56,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:45:56,143 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-12 13:45:56,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 13:45:56,143 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:45:56,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:45:56,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1306188432, now seen corresponding path program 1 times [2020-10-12 13:45:56,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:45:56,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859773544] [2020-10-12 13:45:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:45:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:45:56,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:56,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:57,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:57,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:45:57,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-12 13:45:57,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:45:57,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1335 [2020-10-12 13:45:57,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:45:57,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:45:57,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-12 13:45:57,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-12 13:45:57,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:45:57,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:45:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:45:57,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:57,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:45:57,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:45:57,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:45:57,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 13:45:57,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:45:57,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:45:57,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:45:57,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:45:57,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:45:57,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:45:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:45:57,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:57,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:45:57,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 13:45:57,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:45:57,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-12 13:45:57,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:45:57,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:45:57,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:45:57,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-12 13:45:57,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:45:57,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-12 13:45:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:45:57,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:58,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:45:58,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:45:58,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 13:45:58,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:45:58,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-12 13:45:58,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:45:58,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:45:58,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:45:58,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 13:45:58,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:45:58,384 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 130 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 13:45:58,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859773544] [2020-10-12 13:45:58,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:45:58,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 13:45:58,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553021473] [2020-10-12 13:45:58,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:45:58,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:45:58,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:45:58,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:45:58,390 INFO L87 Difference]: Start difference. First operand 18232 states and 23710 transitions. Second operand 7 states. [2020-10-12 13:46:28,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:46:28,314 INFO L93 Difference]: Finished difference Result 52659 states and 75501 transitions. [2020-10-12 13:46:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 13:46:28,316 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 242 [2020-10-12 13:46:28,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:46:28,484 INFO L225 Difference]: With dead ends: 52659 [2020-10-12 13:46:28,484 INFO L226 Difference]: Without dead ends: 35236 [2020-10-12 13:46:28,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-12 13:46:28,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35236 states. [2020-10-12 13:46:29,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35236 to 35033. [2020-10-12 13:46:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35033 states. [2020-10-12 13:46:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35033 states to 35033 states and 48432 transitions. [2020-10-12 13:46:29,362 INFO L78 Accepts]: Start accepts. Automaton has 35033 states and 48432 transitions. Word has length 242 [2020-10-12 13:46:29,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:46:29,363 INFO L479 AbstractCegarLoop]: Abstraction has 35033 states and 48432 transitions. [2020-10-12 13:46:29,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:46:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 35033 states and 48432 transitions. [2020-10-12 13:46:29,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-10-12 13:46:29,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:46:29,370 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:46:29,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 13:46:29,371 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:46:29,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:46:29,371 INFO L82 PathProgramCache]: Analyzing trace with hash -636864451, now seen corresponding path program 1 times [2020-10-12 13:46:29,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:46:29,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105661013] [2020-10-12 13:46:29,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:46:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:46:29,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:29,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:29,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:30,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:33,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:46:33,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 296 [2020-10-12 13:46:33,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 13:46:33,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3994 [2020-10-12 13:46:33,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:46:33,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 13:46:33,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:46:33,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 227 [2020-10-12 13:46:33,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:46:33,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:46:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:46:33,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:33,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:46:33,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:46:33,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:46:33,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 13:46:33,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:46:33,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:46:33,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:46:33,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:46:33,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:46:33,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:46:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:46:33,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:33,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:34,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:46:34,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 13:46:34,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:46:34,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 382 [2020-10-12 13:46:34,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:46:34,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:46:34,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:46:34,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-12 13:46:34,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:46:34,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-12 13:46:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:46:34,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:34,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:46:34,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 13:46:34,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:46:34,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-12 13:46:34,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:46:34,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:46:34,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:46:34,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-12 13:46:34,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:46:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-12 13:46:34,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105661013] [2020-10-12 13:46:34,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:46:34,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 13:46:34,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101997222] [2020-10-12 13:46:34,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:46:34,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:46:34,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:46:34,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:46:34,486 INFO L87 Difference]: Start difference. First operand 35033 states and 48432 transitions. Second operand 7 states. [2020-10-12 13:47:02,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:47:02,747 INFO L93 Difference]: Finished difference Result 93270 states and 139146 transitions. [2020-10-12 13:47:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 13:47:02,750 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 284 [2020-10-12 13:47:02,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:47:03,006 INFO L225 Difference]: With dead ends: 93270 [2020-10-12 13:47:03,007 INFO L226 Difference]: Without dead ends: 59046 [2020-10-12 13:47:03,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-12 13:47:03,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59046 states. [2020-10-12 13:47:04,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59046 to 58089. [2020-10-12 13:47:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58089 states. [2020-10-12 13:47:04,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58089 states to 58089 states and 81152 transitions. [2020-10-12 13:47:04,823 INFO L78 Accepts]: Start accepts. Automaton has 58089 states and 81152 transitions. Word has length 284 [2020-10-12 13:47:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:47:04,824 INFO L479 AbstractCegarLoop]: Abstraction has 58089 states and 81152 transitions. [2020-10-12 13:47:04,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:47:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 58089 states and 81152 transitions. [2020-10-12 13:47:04,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-12 13:47:04,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:47:04,832 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:47:04,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 13:47:04,833 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:47:04,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:47:04,834 INFO L82 PathProgramCache]: Analyzing trace with hash 96927893, now seen corresponding path program 1 times [2020-10-12 13:47:04,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:47:04,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952318477] [2020-10-12 13:47:04,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:47:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:47:04,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:47:05,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:47:05,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:47:06,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:47:06,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:47:06,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-12 13:47:06,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 13:47:06,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1995 [2020-10-12 13:47:06,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:47:06,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:47:06,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-12 13:47:06,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-12 13:47:06,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 13:47:07,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:47:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:47:07,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:47:07,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:47:07,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:47:07,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:47:07,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 13:47:07,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:47:07,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:47:07,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:47:07,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:47:07,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:47:07,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:47:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:47:07,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:47:07,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:47:07,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 13:47:07,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:47:07,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-12 13:47:07,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:47:07,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:47:07,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:47:07,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-12 13:47:07,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:47:07,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-12 13:47:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:47:07,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:47:07,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:47:09,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:47:09,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 13:47:09,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:47:09,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1742 [2020-10-12 13:47:09,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:47:09,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:47:09,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:47:09,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-12 13:47:09,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:47:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 202 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 13:47:09,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952318477] [2020-10-12 13:47:09,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:47:09,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 13:47:09,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582286822] [2020-10-12 13:47:09,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 13:47:09,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:47:09,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 13:47:09,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 13:47:09,288 INFO L87 Difference]: Start difference. First operand 58089 states and 81152 transitions. Second operand 6 states.