/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 SingleStatement --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=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 03:12:37,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:12:37,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:12:37,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:12:37,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:12:37,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:12:37,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:12:37,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:12:37,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:12:37,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:12:37,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:12:37,807 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:12:37,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:12:37,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:12:37,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:12:37,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:12:37,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:12:37,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:12:37,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:12:37,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:12:37,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:12:37,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:12:37,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:12:37,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:12:37,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:12:37,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:12:37,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:12:37,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:12:37,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:12:37,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:12:37,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:12:37,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:12:37,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:12:37,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:12:37,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:12:37,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:12:37,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:12:37,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:12:37,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:12:37,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:12:37,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:12:37,853 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 [2020-09-25 03:12:37,901 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:12:37,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:12:37,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:12:37,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:12:37,905 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:12:37,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:12:37,906 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:12:37,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:12:37,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:12:37,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:12:37,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:12:37,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:12:37,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:12:37,908 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:12:37,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:12:37,909 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:12:37,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:12:37,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:12:37,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:12:37,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:12:37,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:12:37,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:12:37,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:12:37,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:12:37,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:12:37,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:12:37,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:12:37,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:12:37,912 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:12:37,912 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 -> SingleStatement 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=WIDEST;log-additional-information=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=WIDEST;log-additional-information=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=WIDEST;log-additional-information=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=WIDEST;log-additional-information=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=WIDEST;log-additional-information=true; [2020-09-25 03:12:38,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:12:38,378 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:12:38,383 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:12:38,385 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:12:38,385 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:12:38,386 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2020-09-25 03:12:38,470 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4407c0bc3/17bf4130882248d8b790da992b1a57cd/FLAG353741b66 [2020-09-25 03:12:39,076 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:12:39,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2020-09-25 03:12:39,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4407c0bc3/17bf4130882248d8b790da992b1a57cd/FLAG353741b66 [2020-09-25 03:12:39,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4407c0bc3/17bf4130882248d8b790da992b1a57cd [2020-09-25 03:12:39,405 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:12:39,411 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:12:39,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:12:39,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:12:39,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:12:39,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:12:39" (1/1) ... [2020-09-25 03:12:39,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@187bf361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:12:39, skipping insertion in model container [2020-09-25 03:12:39,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:12:39" (1/1) ... [2020-09-25 03:12:39,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:12:39,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:12:39,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:12:39,710 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:12:39,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:12:39,760 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:12:39,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:12:39 WrapperNode [2020-09-25 03:12:39,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:12:39,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:12:39,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:12:39,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:12:39,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:12:39" (1/1) ... [2020-09-25 03:12:39,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:12:39" (1/1) ... [2020-09-25 03:12:39,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:12:39" (1/1) ... [2020-09-25 03:12:39,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:12:39" (1/1) ... [2020-09-25 03:12:39,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:12:39" (1/1) ... [2020-09-25 03:12:39,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:12:39" (1/1) ... [2020-09-25 03:12:39,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:12:39" (1/1) ... [2020-09-25 03:12:39,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:12:39,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:12:39,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:12:39,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:12:39,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:12:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:12:39,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:12:39,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:12:39,976 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 03:12:39,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 03:12:39,977 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-25 03:12:39,977 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:12:39,977 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-09-25 03:12:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 03:12:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 03:12:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:12:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 03:12:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 03:12:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 03:12:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 03:12:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 03:12:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 03:12:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:12:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 03:12:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-09-25 03:12:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 03:12:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:12:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:12:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 03:12:40,436 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:12:40,437 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 03:12:40,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:12:40 BoogieIcfgContainer [2020-09-25 03:12:40,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:12:40,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:12:40,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:12:40,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:12:40,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:12:39" (1/3) ... [2020-09-25 03:12:40,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1871c3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:12:40, skipping insertion in model container [2020-09-25 03:12:40,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:12:39" (2/3) ... [2020-09-25 03:12:40,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1871c3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:12:40, skipping insertion in model container [2020-09-25 03:12:40,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:12:40" (3/3) ... [2020-09-25 03:12:40,454 INFO L109 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2020-09-25 03:12:40,466 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:12:40,476 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:12:40,500 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:12:40,529 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:12:40,529 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:12:40,529 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:12:40,529 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:12:40,529 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:12:40,529 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:12:40,530 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:12:40,530 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:12:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-09-25 03:12:40,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 03:12:40,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:12:40,566 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 03:12:40,567 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:12:40,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:12:40,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1228919024, now seen corresponding path program 1 times [2020-09-25 03:12:40,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:12:40,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673850035] [2020-09-25 03:12:40,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:12:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:40,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:41,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:41,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 03:12:41,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:41,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-09-25 03:12:41,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:41,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 03:12:41,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 03:12:41,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 03:12:41,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 03:12:41,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:12:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:41,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:41,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:41,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:12:41,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:41,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 03:12:41,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:12:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:12:41,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:12:41,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 03:12:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:41,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:41,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:41,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:12:41,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:41,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:12:41,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:41,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:12:41,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:41,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:12:41,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:12:41,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 03:12:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:41,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:41,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:41,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:12:41,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:41,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 03:12:41,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:41,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:12:41,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:41,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:12:41,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:12:41,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 03:12:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:41,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:41,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:41,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 03:12:41,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:41,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:12:41,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:41,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:12:41,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:41,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:12:41,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:12:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 03:12:41,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673850035] [2020-09-25 03:12:41,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:12:41,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-25 03:12:41,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446226922] [2020-09-25 03:12:41,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 03:12:41,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:12:41,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 03:12:41,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 03:12:41,741 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 10 states. [2020-09-25 03:12:42,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:12:42,684 INFO L93 Difference]: Finished difference Result 221 states and 257 transitions. [2020-09-25 03:12:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 03:12:42,687 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-09-25 03:12:42,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:12:42,705 INFO L225 Difference]: With dead ends: 221 [2020-09-25 03:12:42,706 INFO L226 Difference]: Without dead ends: 138 [2020-09-25 03:12:42,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-25 03:12:42,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-25 03:12:42,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 122. [2020-09-25 03:12:42,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-25 03:12:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2020-09-25 03:12:42,794 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 40 [2020-09-25 03:12:42,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:12:42,795 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2020-09-25 03:12:42,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 03:12:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2020-09-25 03:12:42,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-25 03:12:42,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:12:42,805 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 03:12:42,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:12:42,806 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:12:42,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:12:42,806 INFO L82 PathProgramCache]: Analyzing trace with hash -2013393660, now seen corresponding path program 1 times [2020-09-25 03:12:42,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:12:42,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088220374] [2020-09-25 03:12:42,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:12:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:42,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:43,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:45,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:45,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 03:12:45,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:12:45,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2459 [2020-09-25 03:12:45,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:45,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-25 03:12:45,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 03:12:45,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 03:12:45,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:12:45,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:12:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:45,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:45,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:45,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:12:45,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:45,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 03:12:45,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:45,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:12:45,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:45,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:12:45,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 03:12:45,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 03:12:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:45,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:45,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:45,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:12:45,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:45,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:12:45,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:45,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:12:45,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:45,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:12:45,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:12:45,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 03:12:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:45,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:45,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:45,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:12:45,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:45,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 03:12:45,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:45,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:12:45,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:45,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 03:12:45,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:12:45,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 03:12:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:45,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:45,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:45,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 03:12:45,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:45,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 03:12:45,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:45,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:12:45,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:45,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 03:12:45,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:12:45,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-25 03:12:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:45,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:45,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:45,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 03:12:45,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:45,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-25 03:12:45,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:45,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:12:45,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:45,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 03:12:45,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:12:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 03:12:45,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088220374] [2020-09-25 03:12:45,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:12:45,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-09-25 03:12:45,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128341523] [2020-09-25 03:12:45,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 03:12:45,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:12:45,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 03:12:45,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-09-25 03:12:45,951 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 19 states. [2020-09-25 03:12:47,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:12:47,711 INFO L93 Difference]: Finished difference Result 170 states and 189 transitions. [2020-09-25 03:12:47,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-25 03:12:47,713 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-09-25 03:12:47,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:12:47,719 INFO L225 Difference]: With dead ends: 170 [2020-09-25 03:12:47,720 INFO L226 Difference]: Without dead ends: 151 [2020-09-25 03:12:47,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 03:12:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-25 03:12:47,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 121. [2020-09-25 03:12:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-25 03:12:47,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2020-09-25 03:12:47,765 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 52 [2020-09-25 03:12:47,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:12:47,766 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2020-09-25 03:12:47,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 03:12:47,766 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2020-09-25 03:12:47,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 03:12:47,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:12:47,771 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-09-25 03:12:47,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:12:47,773 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:12:47,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:12:47,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1709597342, now seen corresponding path program 1 times [2020-09-25 03:12:47,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:12:47,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015882081] [2020-09-25 03:12:47,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:12:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:47,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:47,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:51,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:51,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-25 03:12:51,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:12:51,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3321 [2020-09-25 03:12:51,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:51,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 03:12:51,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 03:12:51,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 03:12:51,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 03:12:51,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:12:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:51,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:51,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:51,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:12:51,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:51,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:12:51,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:51,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:12:51,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:51,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:12:51,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:12:51,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 03:12:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:51,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:51,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:51,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:12:51,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:51,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:12:51,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:51,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:12:51,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:51,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:12:51,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:12:51,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 03:12:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:51,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:51,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:51,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:12:51,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:51,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:12:51,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:51,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:12:51,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:51,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:12:51,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:12:51,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 03:12:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:51,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:51,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:51,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 03:12:51,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:51,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:12:51,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:12:51,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:51,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:12:51,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:12:51,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 03:12:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:51,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:51,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:51,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:12:51,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:51,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 03:12:51,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:51,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:12:51,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:51,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:12:51,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:12:51,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 03:12:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:51,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:51,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:51,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:12:51,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:51,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 03:12:51,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:51,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:12:51,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:51,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:12:51,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:12:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 03:12:51,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015882081] [2020-09-25 03:12:51,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:12:51,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 03:12:51,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906274157] [2020-09-25 03:12:51,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 03:12:51,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:12:51,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 03:12:51,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-25 03:12:51,465 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand 15 states. [2020-09-25 03:12:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:12:53,138 INFO L93 Difference]: Finished difference Result 195 states and 212 transitions. [2020-09-25 03:12:53,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 03:12:53,138 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-25 03:12:53,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:12:53,141 INFO L225 Difference]: With dead ends: 195 [2020-09-25 03:12:53,141 INFO L226 Difference]: Without dead ends: 193 [2020-09-25 03:12:53,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-09-25 03:12:53,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-25 03:12:53,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 164. [2020-09-25 03:12:53,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-25 03:12:53,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 178 transitions. [2020-09-25 03:12:53,162 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 178 transitions. Word has length 67 [2020-09-25 03:12:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:12:53,162 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 178 transitions. [2020-09-25 03:12:53,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 03:12:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 178 transitions. [2020-09-25 03:12:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 03:12:53,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:12:53,165 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-09-25 03:12:53,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:12:53,165 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:12:53,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:12:53,166 INFO L82 PathProgramCache]: Analyzing trace with hash 587834366, now seen corresponding path program 1 times [2020-09-25 03:12:53,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:12:53,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710526606] [2020-09-25 03:12:53,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:12:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:53,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:53,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:53,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:58,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:58,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-25 03:12:58,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:12:58,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 03:12:58,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:58,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 03:12:58,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 03:12:58,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 03:12:58,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:12:58,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:12:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:58,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:58,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:58,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:12:58,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:58,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:12:58,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:58,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:12:58,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:58,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:12:58,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:12:58,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 03:12:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:58,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:58,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:58,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:12:58,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:58,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:12:58,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:58,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:12:58,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:58,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:12:58,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:12:58,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 03:12:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:58,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:58,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:58,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:12:58,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:58,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:12:58,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:58,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:12:58,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:58,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:12:58,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:12:58,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 03:12:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:58,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:58,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:58,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 03:12:58,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:58,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:12:58,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:58,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:12:58,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:58,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:12:58,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:12:58,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 03:12:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:58,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:58,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:58,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:12:58,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:58,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 03:12:58,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:58,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:12:58,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:58,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:12:58,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:12:58,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 03:12:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:12:58,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:12:58,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:12:58,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:12:58,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:12:58,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 03:12:58,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:12:58,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:12:58,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:12:58,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:12:58,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:12:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 03:12:58,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710526606] [2020-09-25 03:12:58,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:12:58,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 03:12:58,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289087787] [2020-09-25 03:12:58,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 03:12:58,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:12:58,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 03:12:58,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-09-25 03:12:58,515 INFO L87 Difference]: Start difference. First operand 164 states and 178 transitions. Second operand 16 states. [2020-09-25 03:13:00,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:13:00,457 INFO L93 Difference]: Finished difference Result 237 states and 260 transitions. [2020-09-25 03:13:00,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 03:13:00,458 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-09-25 03:13:00,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:13:00,463 INFO L225 Difference]: With dead ends: 237 [2020-09-25 03:13:00,463 INFO L226 Difference]: Without dead ends: 235 [2020-09-25 03:13:00,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=257, Invalid=865, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 03:13:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-25 03:13:00,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 207. [2020-09-25 03:13:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-09-25 03:13:00,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 226 transitions. [2020-09-25 03:13:00,503 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 226 transitions. Word has length 67 [2020-09-25 03:13:00,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:13:00,503 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 226 transitions. [2020-09-25 03:13:00,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 03:13:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 226 transitions. [2020-09-25 03:13:00,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 03:13:00,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:13:00,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:13:00,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 03:13:00,506 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:13:00,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:13:00,507 INFO L82 PathProgramCache]: Analyzing trace with hash 687369648, now seen corresponding path program 1 times [2020-09-25 03:13:00,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:13:00,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368454630] [2020-09-25 03:13:00,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:13:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:00,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:00,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:01,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:05,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:13:05,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 03:13:05,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:13:05,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 03:13:05,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:13:05,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-25 03:13:05,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 03:13:05,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-25 03:13:05,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:13:06,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:13:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:06,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:06,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:13:06,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:13:06,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:13:06,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 03:13:06,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:13:06,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:13:06,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:13:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:13:06,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:13:06,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 03:13:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:06,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:06,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:13:06,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:13:06,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:13:06,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:13:06,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:13:06,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:13:06,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:13:06,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:13:06,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:13:06,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 03:13:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:06,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:06,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:13:06,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:13:06,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:13:06,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 03:13:06,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:13:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:13:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:13:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 03:13:06,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:13:06,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 03:13:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:06,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:06,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:13:06,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 03:13:06,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:13:06,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 03:13:06,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:13:06,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:13:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:13:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 03:13:06,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:13:06,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 03:13:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:06,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:06,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:13:06,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:13:06,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:13:06,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 03:13:06,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:13:06,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:13:06,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:13:06,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:13:06,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:13:06,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 03:13:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:06,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:06,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:13:06,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:13:06,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:13:06,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 03:13:06,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:13:06,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:13:06,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:13:06,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:13:06,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:13:06,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-25 03:13:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:06,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:07,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:13:07,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 03:13:07,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:13:07,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-09-25 03:13:07,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:13:07,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:13:07,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:13:07,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 03:13:07,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:13:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-25 03:13:07,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368454630] [2020-09-25 03:13:07,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:13:07,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-25 03:13:07,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937032264] [2020-09-25 03:13:07,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-25 03:13:07,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:13:07,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-25 03:13:07,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2020-09-25 03:13:07,230 INFO L87 Difference]: Start difference. First operand 207 states and 226 transitions. Second operand 29 states. [2020-09-25 03:13:08,510 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-09-25 03:13:08,689 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-09-25 03:13:08,897 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-09-25 03:13:09,100 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-09-25 03:13:09,457 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-09-25 03:13:09,633 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-09-25 03:13:10,320 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-09-25 03:13:12,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:13:12,346 INFO L93 Difference]: Finished difference Result 299 states and 335 transitions. [2020-09-25 03:13:12,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-25 03:13:12,347 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-09-25 03:13:12,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:13:12,350 INFO L225 Difference]: With dead ends: 299 [2020-09-25 03:13:12,350 INFO L226 Difference]: Without dead ends: 297 [2020-09-25 03:13:12,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=507, Invalid=3399, Unknown=0, NotChecked=0, Total=3906 [2020-09-25 03:13:12,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-09-25 03:13:12,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 223. [2020-09-25 03:13:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-09-25 03:13:12,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 242 transitions. [2020-09-25 03:13:12,374 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 242 transitions. Word has length 79 [2020-09-25 03:13:12,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:13:12,374 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 242 transitions. [2020-09-25 03:13:12,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-25 03:13:12,374 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 242 transitions. [2020-09-25 03:13:12,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 03:13:12,377 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:13:12,377 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:13:12,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 03:13:12,377 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:13:12,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:13:12,378 INFO L82 PathProgramCache]: Analyzing trace with hash -10182896, now seen corresponding path program 1 times [2020-09-25 03:13:12,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:13:12,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500265394] [2020-09-25 03:13:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:13:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:12,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:12,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:13,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:13,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:17,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:13:17,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 03:13:17,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:13:17,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 03:13:17,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:13:17,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 03:13:17,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 03:13:17,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-25 03:13:17,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:13:18,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:13:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:18,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:18,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:13:18,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 03:13:18,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:13:18,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:13:18,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:13:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:13:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:13:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:13:18,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:13:18,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 03:13:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:18,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:18,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:13:18,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:13:18,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:13:18,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 03:13:18,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:13:18,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:13:18,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:13:18,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:13:18,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:13:18,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 03:13:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:18,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:18,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:13:18,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:13:18,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:13:18,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 03:13:18,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:13:18,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:13:18,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:13:18,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 03:13:18,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:13:18,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 03:13:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:18,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:18,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:13:18,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 03:13:18,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:13:18,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 03:13:18,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:13:18,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:13:18,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:13:18,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 03:13:18,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:13:18,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 03:13:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:18,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:18,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:13:18,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:13:18,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:13:18,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 03:13:18,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:13:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:13:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:13:18,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:13:18,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:13:18,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 03:13:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:18,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:18,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:13:18,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 03:13:18,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:13:18,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 03:13:18,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:13:18,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:13:18,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:13:18,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:13:18,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:13:18,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-25 03:13:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:18,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:18,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:13:18,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 03:13:18,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:13:18,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-25 03:13:18,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:13:18,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:13:18,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:13:18,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 03:13:18,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:13:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-25 03:13:18,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500265394] [2020-09-25 03:13:18,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:13:18,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-25 03:13:18,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239489020] [2020-09-25 03:13:18,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-25 03:13:18,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:13:18,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-25 03:13:18,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-09-25 03:13:18,886 INFO L87 Difference]: Start difference. First operand 223 states and 242 transitions. Second operand 28 states. [2020-09-25 03:13:20,162 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-09-25 03:13:20,355 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-09-25 03:13:20,599 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-09-25 03:13:20,844 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-09-25 03:13:21,018 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-09-25 03:13:21,222 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-09-25 03:13:21,409 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-09-25 03:13:22,138 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-09-25 03:13:22,466 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-09-25 03:13:22,700 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-09-25 03:13:22,954 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-09-25 03:13:23,222 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-09-25 03:13:23,454 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-09-25 03:13:23,692 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-09-25 03:13:23,937 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-09-25 03:13:24,185 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-09-25 03:13:25,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:13:25,044 INFO L93 Difference]: Finished difference Result 300 states and 335 transitions. [2020-09-25 03:13:25,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-25 03:13:25,045 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-09-25 03:13:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:13:25,048 INFO L225 Difference]: With dead ends: 300 [2020-09-25 03:13:25,049 INFO L226 Difference]: Without dead ends: 298 [2020-09-25 03:13:25,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=518, Invalid=3022, Unknown=0, NotChecked=0, Total=3540 [2020-09-25 03:13:25,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-09-25 03:13:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 225. [2020-09-25 03:13:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-09-25 03:13:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 245 transitions. [2020-09-25 03:13:25,084 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 245 transitions. Word has length 79 [2020-09-25 03:13:25,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:13:25,085 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 245 transitions. [2020-09-25 03:13:25,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-25 03:13:25,085 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 245 transitions. [2020-09-25 03:13:25,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-25 03:13:25,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:13:25,087 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:13:25,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 03:13:25,088 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:13:25,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:13:25,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1486199216, now seen corresponding path program 2 times [2020-09-25 03:13:25,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:13:25,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226580257] [2020-09-25 03:13:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:13:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:13:25,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:25,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:13:25,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking...