/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/Problem04_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 11:30:26,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 11:30:26,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 11:30:26,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 11:30:26,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 11:30:26,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 11:30:26,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 11:30:26,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 11:30:26,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 11:30:26,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 11:30:26,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 11:30:26,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 11:30:26,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 11:30:26,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 11:30:26,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 11:30:26,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 11:30:26,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 11:30:26,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 11:30:26,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 11:30:26,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 11:30:26,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 11:30:26,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 11:30:26,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 11:30:26,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 11:30:26,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 11:30:26,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 11:30:26,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 11:30:26,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 11:30:26,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 11:30:26,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 11:30:26,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 11:30:26,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 11:30:26,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 11:30:26,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 11:30:26,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 11:30:26,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 11:30:26,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 11:30:26,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 11:30:26,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 11:30:26,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 11:30:26,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 11:30:26,670 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 11:30:26,692 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 11:30:26,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 11:30:26,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 11:30:26,694 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 11:30:26,694 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 11:30:26,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 11:30:26,695 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 11:30:26,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 11:30:26,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 11:30:26,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 11:30:26,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 11:30:26,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 11:30:26,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 11:30:26,696 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 11:30:26,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 11:30:26,696 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 11:30:26,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 11:30:26,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 11:30:26,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 11:30:26,697 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 11:30:26,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 11:30:26,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 11:30:26,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 11:30:26,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 11:30:26,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 11:30:26,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 11:30:26,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 11:30:26,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 11:30:26,699 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 11:30:26,699 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 11:30:27,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 11:30:27,027 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 11:30:27,033 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 11:30:27,035 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 11:30:27,036 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 11:30:27,037 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label02.c [2020-10-12 11:30:27,110 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d4ecedbe/e92543cd2ee04db2acb234c2bf5f906d/FLAGb5ca9d8c4 [2020-10-12 11:30:27,968 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 11:30:27,968 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label02.c [2020-10-12 11:30:27,997 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d4ecedbe/e92543cd2ee04db2acb234c2bf5f906d/FLAGb5ca9d8c4 [2020-10-12 11:30:28,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d4ecedbe/e92543cd2ee04db2acb234c2bf5f906d [2020-10-12 11:30:28,071 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 11:30:28,073 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 11:30:28,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 11:30:28,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 11:30:28,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 11:30:28,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:30:28" (1/1) ... [2020-10-12 11:30:28,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67578ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:30:28, skipping insertion in model container [2020-10-12 11:30:28,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:30:28" (1/1) ... [2020-10-12 11:30:28,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 11:30:28,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 11:30:29,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 11:30:29,840 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 11:30:30,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 11:30:30,508 INFO L208 MainTranslator]: Completed translation [2020-10-12 11:30:30,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:30:30 WrapperNode [2020-10-12 11:30:30,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 11:30:30,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 11:30:30,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 11:30:30,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 11:30:30,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:30:30" (1/1) ... [2020-10-12 11:30:30,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:30:30" (1/1) ... [2020-10-12 11:30:30,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:30:30" (1/1) ... [2020-10-12 11:30:30,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:30:30" (1/1) ... [2020-10-12 11:30:30,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:30:30" (1/1) ... [2020-10-12 11:30:30,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:30:30" (1/1) ... [2020-10-12 11:30:30,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:30:30" (1/1) ... [2020-10-12 11:30:30,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 11:30:30,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 11:30:30,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 11:30:30,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 11:30:30,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:30:30" (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 11:30:30,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 11:30:30,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 11:30:30,875 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-12 11:30:30,876 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-12 11:30:30,876 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-12 11:30:30,877 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-12 11:30:30,877 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 11:30:30,879 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-12 11:30:30,879 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-12 11:30:30,879 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-12 11:30:30,880 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-12 11:30:30,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 11:30:30,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 11:30:30,880 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 11:30:30,880 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 11:30:30,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 11:30:30,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 11:30:35,273 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 11:30:35,274 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 11:30:35,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:30:35 BoogieIcfgContainer [2020-10-12 11:30:35,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 11:30:35,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 11:30:35,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 11:30:35,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 11:30:35,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 11:30:28" (1/3) ... [2020-10-12 11:30:35,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33252848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:30:35, skipping insertion in model container [2020-10-12 11:30:35,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:30:30" (2/3) ... [2020-10-12 11:30:35,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33252848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:30:35, skipping insertion in model container [2020-10-12 11:30:35,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:30:35" (3/3) ... [2020-10-12 11:30:35,292 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label02.c [2020-10-12 11:30:35,303 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 11:30:35,312 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 11:30:35,329 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 11:30:35,356 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 11:30:35,357 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 11:30:35,357 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 11:30:35,357 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 11:30:35,357 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 11:30:35,357 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 11:30:35,357 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 11:30:35,358 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 11:30:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states. [2020-10-12 11:30:35,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2020-10-12 11:30:35,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:30:35,432 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:30:35,432 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:30:35,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:30:35,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1081539403, now seen corresponding path program 1 times [2020-10-12 11:30:35,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:30:35,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520159674] [2020-10-12 11:30:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:30:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:30:36,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:30:40,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:30:41,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:30:41,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 828 [2020-10-12 11:30:41,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 11:30:41,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 11:30:41,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:30:41,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 11:30:41,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 11:30:41,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 742 [2020-10-12 11:30:41,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 11:30:43,511 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-12 11:30:43,630 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-12 11:30:43,791 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-12 11:30:43,975 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-12 11:30:44,380 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-10-12 11:30:44,626 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-10-12 11:30:45,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:30:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:30:45,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:30:45,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:30:45,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:30:45,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:30:45,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 11:30:45,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:30:45,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:30:45,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:30:45,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 11:30:45,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:30:49,811 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 11:30:49,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520159674] [2020-10-12 11:30:49,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 11:30:49,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-12 11:30:49,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800134327] [2020-10-12 11:30:49,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 11:30:49,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:30:49,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 11:30:49,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-12 11:30:49,838 INFO L87 Difference]: Start difference. First operand 906 states. Second operand 18 states. [2020-10-12 11:30:50,502 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-12 11:30:50,844 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-12 11:30:51,141 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-12 11:30:53,312 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-12 11:30:53,663 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 107 [2020-10-12 11:30:55,789 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2020-10-12 11:30:56,926 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2020-10-12 11:31:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 11:31:06,369 INFO L93 Difference]: Finished difference Result 2548 states and 4905 transitions. [2020-10-12 11:31:06,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 11:31:06,375 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 814 [2020-10-12 11:31:06,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 11:31:06,488 INFO L225 Difference]: With dead ends: 2548 [2020-10-12 11:31:06,489 INFO L226 Difference]: Without dead ends: 1580 [2020-10-12 11:31:06,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 11:31:06,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2020-10-12 11:31:06,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1580. [2020-10-12 11:31:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1580 states. [2020-10-12 11:31:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2339 transitions. [2020-10-12 11:31:06,710 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2339 transitions. Word has length 814 [2020-10-12 11:31:06,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 11:31:06,714 INFO L479 AbstractCegarLoop]: Abstraction has 1580 states and 2339 transitions. [2020-10-12 11:31:06,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 11:31:06,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2339 transitions. [2020-10-12 11:31:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2020-10-12 11:31:06,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:31:06,764 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:31:06,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 11:31:06,765 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:31:06,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:31:06,766 INFO L82 PathProgramCache]: Analyzing trace with hash -503104100, now seen corresponding path program 1 times [2020-10-12 11:31:06,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:31:06,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589192174] [2020-10-12 11:31:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:31:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:31:07,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:31:08,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:31:11,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:31:12,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:31:12,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 849 [2020-10-12 11:31:12,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 11:31:12,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 11:31:12,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:31:12,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 11:31:12,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 11:31:12,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 705 [2020-10-12 11:31:12,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 11:31:14,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:31:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:31:14,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:31:14,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:31:14,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:31:14,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:31:14,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 11:31:14,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:31:14,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:31:14,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:31:14,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:31:14,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:31:14,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 11:31:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:31:14,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:31:14,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:31:14,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 11:31:14,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:31:14,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 11:31:14,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:31:14,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:31:14,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:31:14,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 11:31:14,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:31:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 11:31:18,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589192174] [2020-10-12 11:31:18,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 11:31:18,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 11:31:18,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163484684] [2020-10-12 11:31:18,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 11:31:18,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:31:18,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 11:31:18,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-12 11:31:18,390 INFO L87 Difference]: Start difference. First operand 1580 states and 2339 transitions. Second operand 19 states. [2020-10-12 11:31:18,769 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-12 11:31:19,058 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-12 11:31:21,188 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-12 11:31:22,042 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-12 11:31:23,208 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2020-10-12 11:31:23,865 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-10-12 11:31:24,733 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2020-10-12 11:31:33,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 11:31:33,141 INFO L93 Difference]: Finished difference Result 3123 states and 5328 transitions. [2020-10-12 11:31:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 11:31:33,143 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 833 [2020-10-12 11:31:33,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 11:31:33,163 INFO L225 Difference]: With dead ends: 3123 [2020-10-12 11:31:33,163 INFO L226 Difference]: Without dead ends: 2276 [2020-10-12 11:31:33,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2020-10-12 11:31:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2020-10-12 11:31:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 2276. [2020-10-12 11:31:33,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2276 states. [2020-10-12 11:31:33,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 3045 transitions. [2020-10-12 11:31:33,281 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 3045 transitions. Word has length 833 [2020-10-12 11:31:33,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 11:31:33,282 INFO L479 AbstractCegarLoop]: Abstraction has 2276 states and 3045 transitions. [2020-10-12 11:31:33,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 11:31:33,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 3045 transitions. [2020-10-12 11:31:33,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2020-10-12 11:31:33,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:31:33,314 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:31:33,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 11:31:33,315 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:31:33,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:31:33,316 INFO L82 PathProgramCache]: Analyzing trace with hash 28304758, now seen corresponding path program 1 times [2020-10-12 11:31:33,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:31:33,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156415997] [2020-10-12 11:31:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:31:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:31:33,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:31:34,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:31:34,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:31:38,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:31:38,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 856 [2020-10-12 11:31:38,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 11:31:38,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 11:31:38,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:31:38,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 11:31:38,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 11:31:38,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 517 [2020-10-12 11:31:38,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:31:40,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:31:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:31:40,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:31:40,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:31:40,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:31:40,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:31:40,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 11:31:40,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:31:40,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:31:40,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:31:40,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:31:40,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:31:40,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 11:31:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:31:40,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:31:40,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:31:40,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 11:31:40,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:31:40,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 11:31:40,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:31:40,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:31:40,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:31:40,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 11:31:40,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:31:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 11:31:43,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156415997] [2020-10-12 11:31:43,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 11:31:43,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 11:31:43,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624585885] [2020-10-12 11:31:43,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 11:31:43,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:31:43,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 11:31:43,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-12 11:31:43,744 INFO L87 Difference]: Start difference. First operand 2276 states and 3045 transitions. Second operand 17 states. [2020-10-12 11:31:44,140 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-12 11:31:47,609 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-12 11:31:56,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 11:31:56,013 INFO L93 Difference]: Finished difference Result 4329 states and 6367 transitions. [2020-10-12 11:31:56,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 11:31:56,015 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 840 [2020-10-12 11:31:56,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 11:31:56,030 INFO L225 Difference]: With dead ends: 4329 [2020-10-12 11:31:56,030 INFO L226 Difference]: Without dead ends: 2786 [2020-10-12 11:31:56,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2020-10-12 11:31:56,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2020-10-12 11:31:56,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2786. [2020-10-12 11:31:56,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2786 states. [2020-10-12 11:31:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 3564 transitions. [2020-10-12 11:31:56,105 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 3564 transitions. Word has length 840 [2020-10-12 11:31:56,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 11:31:56,106 INFO L479 AbstractCegarLoop]: Abstraction has 2786 states and 3564 transitions. [2020-10-12 11:31:56,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 11:31:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 3564 transitions. [2020-10-12 11:31:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 851 [2020-10-12 11:31:56,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:31:56,120 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:31:56,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 11:31:56,120 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:31:56,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:31:56,121 INFO L82 PathProgramCache]: Analyzing trace with hash 784760111, now seen corresponding path program 1 times [2020-10-12 11:31:56,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:31:56,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605511844] [2020-10-12 11:31:56,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:31:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:31:56,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:31:58,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:31:58,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:31:58,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 868 [2020-10-12 11:31:58,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 11:31:58,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2451 [2020-10-12 11:31:58,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:31:58,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 11:31:58,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-12 11:31:58,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 819 [2020-10-12 11:31:58,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:31:59,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:31:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:31:59,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:31:59,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:31:59,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:31:59,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:31:59,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 11:31:59,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:31:59,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:31:59,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:31:59,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:31:59,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:31:59,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 11:31:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:31:59,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:31:59,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:31:59,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 11:31:59,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:31:59,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 11:31:59,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:31:59,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:31:59,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:31:59,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:31:59,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:31:59,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 11:31:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:31:59,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:31:59,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:31:59,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 11:31:59,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:31:59,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 11:31:59,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:31:59,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:31:59,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:31:59,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 11:31:59,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 11:32:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 11:32:00,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605511844] [2020-10-12 11:32:00,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 11:32:00,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 11:32:00,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413689046] [2020-10-12 11:32:00,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 11:32:00,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:32:00,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 11:32:00,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 11:32:00,538 INFO L87 Difference]: Start difference. First operand 2786 states and 3564 transitions. Second operand 5 states. [2020-10-12 11:32:08,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 11:32:08,562 INFO L93 Difference]: Finished difference Result 5686 states and 8006 transitions. [2020-10-12 11:32:08,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 11:32:08,563 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 850 [2020-10-12 11:32:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 11:32:08,581 INFO L225 Difference]: With dead ends: 5686 [2020-10-12 11:32:08,581 INFO L226 Difference]: Without dead ends: 3633 [2020-10-12 11:32:08,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 11:32:08,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2020-10-12 11:32:08,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 3633. [2020-10-12 11:32:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3633 states. [2020-10-12 11:32:08,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 4956 transitions. [2020-10-12 11:32:08,670 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 4956 transitions. Word has length 850 [2020-10-12 11:32:08,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 11:32:08,672 INFO L479 AbstractCegarLoop]: Abstraction has 3633 states and 4956 transitions. [2020-10-12 11:32:08,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 11:32:08,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 4956 transitions. [2020-10-12 11:32:08,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2020-10-12 11:32:08,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:32:08,688 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:32:08,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 11:32:08,688 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:32:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:32:08,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1866422004, now seen corresponding path program 1 times [2020-10-12 11:32:08,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:32:08,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589830031] [2020-10-12 11:32:08,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:32:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:32:08,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:08,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:13,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:13,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:13,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:32:13,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 879 [2020-10-12 11:32:13,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 11:32:13,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-12 11:32:13,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:32:13,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 11:32:13,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-12 11:32:13,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 718 [2020-10-12 11:32:13,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:32:16,590 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-12 11:32:16,762 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-12 11:32:16,945 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2020-10-12 11:32:17,133 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 45 [2020-10-12 11:32:17,271 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-12 11:32:17,410 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-12 11:32:17,545 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-12 11:32:18,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:32:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:32:18,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:18,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:32:18,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:32:18,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:32:18,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 11:32:18,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:32:18,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:32:18,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:32:18,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:32:18,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:32:18,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 11:32:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:32:18,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:18,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:32:18,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 11:32:18,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:32:18,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 11:32:18,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:32:18,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:32:18,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:32:18,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:32:18,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:32:18,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 11:32:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:32:18,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:18,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:32:18,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 11:32:18,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:32:18,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 11:32:18,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:32:18,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:32:18,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:32:18,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:32:18,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:32:18,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 11:32:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:32:18,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:18,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:32:18,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 11:32:18,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:32:18,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 11:32:18,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:32:18,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:32:18,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:32:18,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 11:32:18,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:32:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 39 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-12 11:32:24,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589830031] [2020-10-12 11:32:24,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 11:32:24,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 11:32:24,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967077423] [2020-10-12 11:32:24,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 11:32:24,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:32:24,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 11:32:24,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-10-12 11:32:24,489 INFO L87 Difference]: Start difference. First operand 3633 states and 4956 transitions. Second operand 19 states. [2020-10-12 11:32:25,282 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-12 11:32:29,644 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-12 11:32:32,313 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-10-12 11:32:32,622 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 108 [2020-10-12 11:32:33,637 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 107 [2020-10-12 11:32:36,352 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 106 [2020-10-12 11:32:40,042 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-10-12 11:32:40,344 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 102 [2020-10-12 11:32:41,963 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 98 [2020-10-12 11:32:45,474 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 97 [2020-10-12 11:32:48,076 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2020-10-12 11:32:48,345 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2020-10-12 11:32:50,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 11:32:50,590 INFO L93 Difference]: Finished difference Result 7242 states and 10599 transitions. [2020-10-12 11:32:50,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 11:32:50,591 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 859 [2020-10-12 11:32:50,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 11:32:50,609 INFO L225 Difference]: With dead ends: 7242 [2020-10-12 11:32:50,610 INFO L226 Difference]: Without dead ends: 4342 [2020-10-12 11:32:50,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2020-10-12 11:32:50,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4342 states. [2020-10-12 11:32:50,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4342 to 4342. [2020-10-12 11:32:50,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4342 states. [2020-10-12 11:32:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 5678 transitions. [2020-10-12 11:32:50,715 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 5678 transitions. Word has length 859 [2020-10-12 11:32:50,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 11:32:50,716 INFO L479 AbstractCegarLoop]: Abstraction has 4342 states and 5678 transitions. [2020-10-12 11:32:50,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 11:32:50,716 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 5678 transitions. [2020-10-12 11:32:50,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 871 [2020-10-12 11:32:50,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:32:50,735 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:32:50,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 11:32:50,736 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:32:50,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:32:50,737 INFO L82 PathProgramCache]: Analyzing trace with hash 221197478, now seen corresponding path program 1 times [2020-10-12 11:32:50,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:32:50,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272816807] [2020-10-12 11:32:50,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:32:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:32:50,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:51,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:51,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:53,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:55,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:55,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:32:55,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 890 [2020-10-12 11:32:55,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 11:32:55,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5101 [2020-10-12 11:32:55,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:32:55,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 11:32:55,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-12 11:32:55,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 797 [2020-10-12 11:32:55,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:32:56,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:32:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:32:56,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:56,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:32:56,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:32:56,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:32:56,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 11:32:56,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:32:56,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:32:56,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:32:56,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:32:56,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:32:56,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 11:32:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:32:56,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:56,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:32:56,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 11:32:56,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:32:56,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 11:32:56,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:32:56,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:32:56,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:32:56,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:32:56,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:32:56,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 11:32:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:32:56,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:56,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:32:56,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 11:32:56,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:32:56,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 11:32:56,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:32:56,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:32:56,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:32:56,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:32:56,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:32:56,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 11:32:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:32:56,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:32:56,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:32:56,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 11:32:56,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:32:56,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 11:32:56,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:32:56,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:32:56,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:32:56,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 11:32:56,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:33:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 50 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-12 11:33:00,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272816807] [2020-10-12 11:33:00,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 11:33:00,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 11:33:00,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939278565] [2020-10-12 11:33:00,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 11:33:00,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:33:00,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 11:33:00,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 11:33:00,137 INFO L87 Difference]: Start difference. First operand 4342 states and 5678 transitions. Second operand 5 states. [2020-10-12 11:33:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 11:33:10,207 INFO L93 Difference]: Finished difference Result 8739 states and 12170 transitions. [2020-10-12 11:33:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 11:33:10,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 870 [2020-10-12 11:33:10,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 11:33:10,229 INFO L225 Difference]: With dead ends: 8739 [2020-10-12 11:33:10,229 INFO L226 Difference]: Without dead ends: 4342 [2020-10-12 11:33:10,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 11:33:10,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4342 states. [2020-10-12 11:33:10,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4342 to 4342. [2020-10-12 11:33:10,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4342 states. [2020-10-12 11:33:10,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 5676 transitions. [2020-10-12 11:33:10,338 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 5676 transitions. Word has length 870 [2020-10-12 11:33:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 11:33:10,338 INFO L479 AbstractCegarLoop]: Abstraction has 4342 states and 5676 transitions. [2020-10-12 11:33:10,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 11:33:10,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 5676 transitions. [2020-10-12 11:33:10,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-10-12 11:33:10,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:33:10,358 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:33:10,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 11:33:10,359 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:33:10,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:33:10,359 INFO L82 PathProgramCache]: Analyzing trace with hash 25009268, now seen corresponding path program 1 times [2020-10-12 11:33:10,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:33:10,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50095925] [2020-10-12 11:33:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:33:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:33:10,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:10,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:11,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:12,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:15,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:15,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:33:15,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 891 [2020-10-12 11:33:15,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 11:33:15,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-12 11:33:15,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:33:15,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 11:33:15,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-12 11:33:15,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 819 [2020-10-12 11:33:15,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:33:15,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:33:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:33:15,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:15,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:33:15,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:33:15,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:33:15,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 11:33:15,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:33:15,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:33:15,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:33:15,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:33:15,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 11:33:15,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 11:33:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:33:15,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:15,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:33:15,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 11:33:15,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:33:15,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 11:33:15,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:33:15,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:33:15,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:33:15,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:33:15,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:33:15,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 11:33:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:33:15,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:15,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:33:15,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 11:33:15,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:33:15,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 11:33:15,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:33:15,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:33:15,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:33:15,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:33:15,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:33:15,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 11:33:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:33:15,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:16,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:33:16,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 11:33:16,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:33:16,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 11:33:16,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:33:16,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:33:16,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:33:16,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 11:33:16,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 11:33:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 51 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-12 11:33:16,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50095925] [2020-10-12 11:33:16,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 11:33:16,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 11:33:16,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799170130] [2020-10-12 11:33:16,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 11:33:16,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:33:16,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 11:33:16,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 11:33:16,774 INFO L87 Difference]: Start difference. First operand 4342 states and 5676 transitions. Second operand 5 states. [2020-10-12 11:33:27,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 11:33:27,145 INFO L93 Difference]: Finished difference Result 9641 states and 13662 transitions. [2020-10-12 11:33:27,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 11:33:27,147 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 871 [2020-10-12 11:33:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 11:33:27,170 INFO L225 Difference]: With dead ends: 9641 [2020-10-12 11:33:27,171 INFO L226 Difference]: Without dead ends: 6032 [2020-10-12 11:33:27,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 11:33:27,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6032 states. [2020-10-12 11:33:27,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6032 to 6032. [2020-10-12 11:33:27,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6032 states. [2020-10-12 11:33:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6032 states to 6032 states and 7922 transitions. [2020-10-12 11:33:27,300 INFO L78 Accepts]: Start accepts. Automaton has 6032 states and 7922 transitions. Word has length 871 [2020-10-12 11:33:27,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 11:33:27,302 INFO L479 AbstractCegarLoop]: Abstraction has 6032 states and 7922 transitions. [2020-10-12 11:33:27,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 11:33:27,302 INFO L276 IsEmpty]: Start isEmpty. Operand 6032 states and 7922 transitions. [2020-10-12 11:33:27,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 931 [2020-10-12 11:33:27,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:33:27,325 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:33:27,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 11:33:27,325 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:33:27,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:33:27,326 INFO L82 PathProgramCache]: Analyzing trace with hash -791257682, now seen corresponding path program 1 times [2020-10-12 11:33:27,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:33:27,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268847148] [2020-10-12 11:33:27,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:33:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:33:27,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:27,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:27,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:29,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:32,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:33:32,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 950 [2020-10-12 11:33:32,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 11:33:32,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 11:33:32,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:33:32,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 11:33:32,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 130 [2020-10-12 11:33:32,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 670 [2020-10-12 11:33:32,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:33:33,714 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-12 11:33:33,832 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-12 11:33:33,951 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-12 11:33:34,091 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-12 11:33:34,216 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-12 11:33:34,527 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-12 11:33:34,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:33:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:33:34,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:34,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:33:34,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:33:34,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:33:34,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 11:33:34,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:33:34,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:33:34,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:33:34,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:33:34,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:33:34,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 11:33:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:33:34,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:34,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:33:34,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 11:33:34,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:33:34,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 11:33:34,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:33:34,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:33:34,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:33:34,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:33:34,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:33:34,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 11:33:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:33:34,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:34,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:33:34,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 11:33:34,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:33:34,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 11:33:34,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:33:34,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:33:34,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:33:34,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:33:34,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:33:34,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 11:33:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:33:35,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:33:35,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:33:35,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 11:33:35,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:33:35,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-12 11:33:35,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:33:35,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:33:35,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:33:35,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 11:33:35,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:33:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-12 11:33:42,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268847148] [2020-10-12 11:33:42,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 11:33:42,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 11:33:42,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027815144] [2020-10-12 11:33:42,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 11:33:42,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:33:42,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 11:33:42,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-12 11:33:42,500 INFO L87 Difference]: Start difference. First operand 6032 states and 7922 transitions. Second operand 17 states. [2020-10-12 11:33:43,593 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-12 11:33:43,789 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 11:33:49,141 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-12 11:33:49,332 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 11:33:52,683 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 11:33:53,621 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-12 11:33:55,111 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-12 11:33:55,284 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-12 11:33:55,715 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 104 [2020-10-12 11:33:59,492 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 101 [2020-10-12 11:34:00,045 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 96 [2020-10-12 11:34:01,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 11:34:01,970 INFO L93 Difference]: Finished difference Result 11994 states and 16449 transitions. [2020-10-12 11:34:01,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 11:34:01,971 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 930 [2020-10-12 11:34:01,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 11:34:01,991 INFO L225 Difference]: With dead ends: 11994 [2020-10-12 11:34:01,992 INFO L226 Difference]: Without dead ends: 6695 [2020-10-12 11:34:02,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2020-10-12 11:34:02,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6695 states. [2020-10-12 11:34:02,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6695 to 6695. [2020-10-12 11:34:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6695 states. [2020-10-12 11:34:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 8599 transitions. [2020-10-12 11:34:02,113 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 8599 transitions. Word has length 930 [2020-10-12 11:34:02,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 11:34:02,115 INFO L479 AbstractCegarLoop]: Abstraction has 6695 states and 8599 transitions. [2020-10-12 11:34:02,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 11:34:02,115 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 8599 transitions. [2020-10-12 11:34:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2020-10-12 11:34:02,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:34:02,141 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:34:02,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 11:34:02,142 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:34:02,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:34:02,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1855851590, now seen corresponding path program 1 times [2020-10-12 11:34:02,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:34:02,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925274904] [2020-10-12 11:34:02,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:34:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:34:02,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:34:02,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:34:06,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:34:06,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:34:07,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:34:07,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 976 [2020-10-12 11:34:07,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 11:34:07,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-12 11:34:07,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:34:07,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 11:34:07,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 156 [2020-10-12 11:34:07,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 520 [2020-10-12 11:34:07,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:34:08,414 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2020-10-12 11:34:08,554 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2020-10-12 11:34:09,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:34:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:34:09,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:34:09,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:34:09,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:34:09,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:34:09,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 11:34:09,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:34:09,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:34:09,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:34:09,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:34:09,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:34:09,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 11:34:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:34:09,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:34:09,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:34:09,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 11:34:09,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:34:09,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 11:34:09,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:34:09,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:34:09,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:34:09,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:34:09,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:34:09,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 11:34:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:34:09,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:34:09,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:34:09,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 11:34:09,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:34:09,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 11:34:09,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:34:09,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:34:09,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:34:09,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:34:09,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:34:09,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 11:34:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:34:09,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:34:09,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:34:09,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-12 11:34:09,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:34:09,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-12 11:34:09,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:34:09,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:34:09,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:34:09,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-12 11:34:09,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:34:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 136 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-12 11:34:13,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925274904] [2020-10-12 11:34:13,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 11:34:13,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 11:34:13,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755456201] [2020-10-12 11:34:13,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 11:34:13,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:34:13,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 11:34:13,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-12 11:34:13,012 INFO L87 Difference]: Start difference. First operand 6695 states and 8599 transitions. Second operand 17 states.