/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:20:25,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:20:25,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:20:25,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:20:25,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:20:25,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:20:25,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:20:25,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:20:25,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:20:25,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:20:25,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:20:25,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:20:25,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:20:25,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:20:25,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:20:25,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:20:25,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:20:25,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:20:25,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:20:25,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:20:25,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:20:25,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:20:25,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:20:25,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:20:25,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:20:25,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:20:25,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:20:25,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:20:25,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:20:25,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:20:25,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:20:25,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:20:25,078 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:20:25,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:20:25,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:20:25,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:20:25,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:20:25,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:20:25,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:20:25,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:20:25,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:20:25,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 09:20:25,106 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:20:25,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:20:25,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:20:25,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:20:25,108 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:20:25,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:20:25,108 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:20:25,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:20:25,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:20:25,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:20:25,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:20:25,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:20:25,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:20:25,110 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:20:25,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:20:25,110 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:20:25,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:20:25,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:20:25,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:20:25,111 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:20:25,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:20:25,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:20:25,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:20:25,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:20:25,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:20:25,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:20:25,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:20:25,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:20:25,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:20:25,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:20:25,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:20:25,436 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:20:25,440 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:20:25,441 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:20:25,442 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:20:25,443 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:20:25,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89e4059f8/a6fbf53994ee497c801453be7100b069/FLAG982eb1b9f [2020-10-14 09:20:26,034 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:20:26,035 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:20:26,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89e4059f8/a6fbf53994ee497c801453be7100b069/FLAG982eb1b9f [2020-10-14 09:20:26,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89e4059f8/a6fbf53994ee497c801453be7100b069 [2020-10-14 09:20:26,354 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:20:26,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:20:26,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:20:26,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:20:26,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:20:26,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:20:26" (1/1) ... [2020-10-14 09:20:26,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@658c4011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:20:26, skipping insertion in model container [2020-10-14 09:20:26,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:20:26" (1/1) ... [2020-10-14 09:20:26,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:20:26,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:20:26,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:20:26,756 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:20:26,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:20:26,986 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:20:26,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:20:26 WrapperNode [2020-10-14 09:20:26,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:20:26,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:20:26,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:20:26,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:20:27,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:20:26" (1/1) ... [2020-10-14 09:20:27,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:20:26" (1/1) ... [2020-10-14 09:20:27,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:20:26" (1/1) ... [2020-10-14 09:20:27,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:20:26" (1/1) ... [2020-10-14 09:20:27,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:20:26" (1/1) ... [2020-10-14 09:20:27,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:20:26" (1/1) ... [2020-10-14 09:20:27,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:20:26" (1/1) ... [2020-10-14 09:20:27,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:20:27,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:20:27,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:20:27,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:20:27,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:20:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:20:27,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:20:27,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:20:27,118 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:20:27,118 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:20:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:20:27,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:20:27,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:20:27,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 09:20:27,119 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:20:27,119 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:20:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:20:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:20:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:20:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:20:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:20:27,120 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:20:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:20:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 09:20:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-14 09:20:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:20:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:20:27,121 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:20:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:20:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:20:27,935 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:20:27,935 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:20:27,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:20:27 BoogieIcfgContainer [2020-10-14 09:20:27,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:20:27,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:20:27,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:20:27,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:20:27,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:20:26" (1/3) ... [2020-10-14 09:20:27,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6324a975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:20:27, skipping insertion in model container [2020-10-14 09:20:27,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:20:26" (2/3) ... [2020-10-14 09:20:27,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6324a975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:20:27, skipping insertion in model container [2020-10-14 09:20:27,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:20:27" (3/3) ... [2020-10-14 09:20:27,958 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 09:20:27,968 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:20:27,976 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:20:27,990 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:20:28,016 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:20:28,016 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:20:28,016 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:20:28,017 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:20:28,017 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:20:28,017 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:20:28,017 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:20:28,017 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:20:28,040 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states. [2020-10-14 09:20:28,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 09:20:28,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:28,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:20:28,054 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:28,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:28,061 INFO L82 PathProgramCache]: Analyzing trace with hash 548589956, now seen corresponding path program 1 times [2020-10-14 09:20:28,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:28,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932832149] [2020-10-14 09:20:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:28,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:28,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:28,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:29,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:33,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:33,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 09:20:33,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:20:33,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:20:33,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:33,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:33,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:33,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-14 09:20:33,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 09:20:33,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 09:20:33,810 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:20:33,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:33,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:33,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:33,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:33,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:33,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 09:20:33,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:33,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:33,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:33,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:33,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932832149] [2020-10-14 09:20:33,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:33,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:33,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018978002] [2020-10-14 09:20:33,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:33,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:33,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:33,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:33,898 INFO L87 Difference]: Start difference. First operand 170 states. Second operand 4 states. [2020-10-14 09:20:34,242 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:20:35,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:35,175 INFO L93 Difference]: Finished difference Result 398 states and 640 transitions. [2020-10-14 09:20:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:35,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-14 09:20:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:35,193 INFO L225 Difference]: With dead ends: 398 [2020-10-14 09:20:35,194 INFO L226 Difference]: Without dead ends: 268 [2020-10-14 09:20:35,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:35,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-14 09:20:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 266. [2020-10-14 09:20:35,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-14 09:20:35,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 396 transitions. [2020-10-14 09:20:35,272 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 396 transitions. Word has length 78 [2020-10-14 09:20:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:35,273 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 396 transitions. [2020-10-14 09:20:35,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:35,273 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 396 transitions. [2020-10-14 09:20:35,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 09:20:35,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:35,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:20:35,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:20:35,277 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:35,278 INFO L82 PathProgramCache]: Analyzing trace with hash 478270724, now seen corresponding path program 1 times [2020-10-14 09:20:35,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:35,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783874448] [2020-10-14 09:20:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:35,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:35,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:35,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:35,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:36,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:39,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:39,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 09:20:39,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:20:39,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3729 [2020-10-14 09:20:39,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:39,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:39,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:39,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 09:20:39,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 09:20:39,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:39,296 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:20:39,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:39,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:39,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:39,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:39,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:39,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:20:39,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:39,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:39,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:39,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:39,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:39,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:39,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783874448] [2020-10-14 09:20:39,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:39,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:39,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732297820] [2020-10-14 09:20:39,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:39,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:39,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:39,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:39,343 INFO L87 Difference]: Start difference. First operand 266 states and 396 transitions. Second operand 4 states. [2020-10-14 09:20:39,569 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:20:40,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:40,340 INFO L93 Difference]: Finished difference Result 670 states and 1040 transitions. [2020-10-14 09:20:40,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:40,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-14 09:20:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:40,352 INFO L225 Difference]: With dead ends: 670 [2020-10-14 09:20:40,352 INFO L226 Difference]: Without dead ends: 452 [2020-10-14 09:20:40,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:40,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-10-14 09:20:40,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 450. [2020-10-14 09:20:40,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-14 09:20:40,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 689 transitions. [2020-10-14 09:20:40,394 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 689 transitions. Word has length 79 [2020-10-14 09:20:40,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:40,394 INFO L479 AbstractCegarLoop]: Abstraction has 450 states and 689 transitions. [2020-10-14 09:20:40,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:40,395 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 689 transitions. [2020-10-14 09:20:40,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:20:40,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:40,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:20:40,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:20:40,397 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:40,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1922015693, now seen corresponding path program 1 times [2020-10-14 09:20:40,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:40,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204008893] [2020-10-14 09:20:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:40,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:40,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:40,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:40,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:42,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:42,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:20:42,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:20:42,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1719 [2020-10-14 09:20:42,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:42,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:42,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:42,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:20:42,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 09:20:42,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:20:42,367 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:20:42,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:42,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:42,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:42,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:42,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:42,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-14 09:20:42,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:42,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:42,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:42,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:42,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:42,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:42,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204008893] [2020-10-14 09:20:42,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:42,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:42,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500097299] [2020-10-14 09:20:42,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:42,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:42,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:42,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:42,430 INFO L87 Difference]: Start difference. First operand 450 states and 689 transitions. Second operand 4 states. [2020-10-14 09:20:42,637 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:20:43,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:43,463 INFO L93 Difference]: Finished difference Result 1190 states and 1867 transitions. [2020-10-14 09:20:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:43,464 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-14 09:20:43,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:43,469 INFO L225 Difference]: With dead ends: 1190 [2020-10-14 09:20:43,469 INFO L226 Difference]: Without dead ends: 788 [2020-10-14 09:20:43,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2020-10-14 09:20:43,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 786. [2020-10-14 09:20:43,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 786 states. [2020-10-14 09:20:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1221 transitions. [2020-10-14 09:20:43,537 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1221 transitions. Word has length 80 [2020-10-14 09:20:43,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:43,538 INFO L479 AbstractCegarLoop]: Abstraction has 786 states and 1221 transitions. [2020-10-14 09:20:43,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:43,538 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1221 transitions. [2020-10-14 09:20:43,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 09:20:43,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:43,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:20:43,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:20:43,541 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:43,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:43,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1094303259, now seen corresponding path program 1 times [2020-10-14 09:20:43,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:43,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436391393] [2020-10-14 09:20:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:43,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:43,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:43,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:44,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:44,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 09:20:44,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:20:44,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 798 [2020-10-14 09:20:44,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:44,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:44,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:44,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 09:20:44,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 09:20:44,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:44,587 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:20:44,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:44,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:44,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:44,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:44,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:44,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:20:44,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:44,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:44,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:44,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:44,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:44,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:44,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436391393] [2020-10-14 09:20:44,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:44,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:44,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776091200] [2020-10-14 09:20:44,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:44,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:44,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:44,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:44,628 INFO L87 Difference]: Start difference. First operand 786 states and 1221 transitions. Second operand 4 states. [2020-10-14 09:20:44,807 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:20:45,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:45,727 INFO L93 Difference]: Finished difference Result 2134 states and 3359 transitions. [2020-10-14 09:20:45,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:45,727 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-14 09:20:45,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:45,738 INFO L225 Difference]: With dead ends: 2134 [2020-10-14 09:20:45,739 INFO L226 Difference]: Without dead ends: 1396 [2020-10-14 09:20:45,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:45,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2020-10-14 09:20:45,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1394. [2020-10-14 09:20:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1394 states. [2020-10-14 09:20:45,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 2177 transitions. [2020-10-14 09:20:45,828 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 2177 transitions. Word has length 81 [2020-10-14 09:20:45,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:45,831 INFO L479 AbstractCegarLoop]: Abstraction has 1394 states and 2177 transitions. [2020-10-14 09:20:45,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:45,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 2177 transitions. [2020-10-14 09:20:45,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 09:20:45,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:45,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:20:45,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:20:45,844 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:45,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:45,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1837116557, now seen corresponding path program 1 times [2020-10-14 09:20:45,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:45,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447279515] [2020-10-14 09:20:45,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:45,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:45,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:46,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:46,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 09:20:46,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:20:46,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-14 09:20:46,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:46,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:46,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:46,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 09:20:46,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 09:20:46,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:46,560 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:20:46,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:46,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:46,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:46,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:46,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:46,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:20:46,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:46,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:46,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:46,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:46,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:46,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:46,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447279515] [2020-10-14 09:20:46,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:46,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:46,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471544612] [2020-10-14 09:20:46,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:46,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:46,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:46,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:46,602 INFO L87 Difference]: Start difference. First operand 1394 states and 2177 transitions. Second operand 4 states. [2020-10-14 09:20:46,804 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:20:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:47,822 INFO L93 Difference]: Finished difference Result 3830 states and 6019 transitions. [2020-10-14 09:20:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:47,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-14 09:20:47,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:47,839 INFO L225 Difference]: With dead ends: 3830 [2020-10-14 09:20:47,840 INFO L226 Difference]: Without dead ends: 2484 [2020-10-14 09:20:47,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:47,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2020-10-14 09:20:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2482. [2020-10-14 09:20:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2482 states. [2020-10-14 09:20:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 3873 transitions. [2020-10-14 09:20:47,990 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 3873 transitions. Word has length 82 [2020-10-14 09:20:47,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:47,992 INFO L479 AbstractCegarLoop]: Abstraction has 2482 states and 3873 transitions. [2020-10-14 09:20:47,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:47,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 3873 transitions. [2020-10-14 09:20:48,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 09:20:48,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:48,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:20:48,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:20:48,003 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:48,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:48,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1474064346, now seen corresponding path program 1 times [2020-10-14 09:20:48,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:48,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206052230] [2020-10-14 09:20:48,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:48,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:48,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:49,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:49,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 09:20:49,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:20:49,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1449 [2020-10-14 09:20:49,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:49,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:49,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 09:20:49,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:20:49,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 09:20:49,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:49,776 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:20:49,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:49,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:49,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:49,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:49,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:49,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:20:49,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:49,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:49,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:49,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:49,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:49,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:49,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206052230] [2020-10-14 09:20:49,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:49,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-14 09:20:49,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282526470] [2020-10-14 09:20:49,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 09:20:49,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:49,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 09:20:49,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 09:20:49,821 INFO L87 Difference]: Start difference. First operand 2482 states and 3873 transitions. Second operand 9 states. [2020-10-14 09:20:50,145 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-14 09:20:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:51,583 INFO L93 Difference]: Finished difference Result 19520 states and 30648 transitions. [2020-10-14 09:20:51,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 09:20:51,584 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-14 09:20:51,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:51,676 INFO L225 Difference]: With dead ends: 19520 [2020-10-14 09:20:51,676 INFO L226 Difference]: Without dead ends: 17086 [2020-10-14 09:20:51,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-14 09:20:51,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17086 states. [2020-10-14 09:20:52,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17086 to 4914. [2020-10-14 09:20:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4914 states. [2020-10-14 09:20:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4914 states to 4914 states and 7633 transitions. [2020-10-14 09:20:52,258 INFO L78 Accepts]: Start accepts. Automaton has 4914 states and 7633 transitions. Word has length 83 [2020-10-14 09:20:52,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:52,259 INFO L479 AbstractCegarLoop]: Abstraction has 4914 states and 7633 transitions. [2020-10-14 09:20:52,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 09:20:52,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4914 states and 7633 transitions. [2020-10-14 09:20:52,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 09:20:52,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:52,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:20:52,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:20:52,261 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:52,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:52,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1567178197, now seen corresponding path program 1 times [2020-10-14 09:20:52,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:52,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965602011] [2020-10-14 09:20:52,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:52,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:52,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:53,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:53,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 09:20:53,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:20:53,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 816 [2020-10-14 09:20:53,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:53,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:53,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:20:53,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-14 09:20:53,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:20:53,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:53,369 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:20:53,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:53,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:53,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:53,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:53,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:53,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:20:53,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:53,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:53,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:53,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:53,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:53,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:53,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965602011] [2020-10-14 09:20:53,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:53,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:20:53,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957384440] [2020-10-14 09:20:53,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:20:53,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:53,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:20:53,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:53,404 INFO L87 Difference]: Start difference. First operand 4914 states and 7633 transitions. Second operand 5 states. [2020-10-14 09:20:55,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:55,249 INFO L93 Difference]: Finished difference Result 9908 states and 15346 transitions. [2020-10-14 09:20:55,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:20:55,250 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-10-14 09:20:55,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:55,299 INFO L225 Difference]: With dead ends: 9908 [2020-10-14 09:20:55,299 INFO L226 Difference]: Without dead ends: 9906 [2020-10-14 09:20:55,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:20:55,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9906 states. [2020-10-14 09:20:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9906 to 5042. [2020-10-14 09:20:55,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5042 states. [2020-10-14 09:20:55,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5042 states to 5042 states and 7761 transitions. [2020-10-14 09:20:55,734 INFO L78 Accepts]: Start accepts. Automaton has 5042 states and 7761 transitions. Word has length 84 [2020-10-14 09:20:55,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:55,738 INFO L479 AbstractCegarLoop]: Abstraction has 5042 states and 7761 transitions. [2020-10-14 09:20:55,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:20:55,738 INFO L276 IsEmpty]: Start isEmpty. Operand 5042 states and 7761 transitions. [2020-10-14 09:20:55,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 09:20:55,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:55,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:20:55,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:20:55,740 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:55,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:55,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1328264023, now seen corresponding path program 1 times [2020-10-14 09:20:55,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:55,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801083914] [2020-10-14 09:20:55,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:55,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:55,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:56,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:56,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 09:20:56,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:20:56,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-14 09:20:56,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:56,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:56,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:56,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:20:56,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 09:20:56,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:56,486 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:20:56,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:56,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:56,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:56,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:56,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:56,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:20:56,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:56,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:56,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:56,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:56,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:56,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:56,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801083914] [2020-10-14 09:20:56,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:56,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:56,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347425586] [2020-10-14 09:20:56,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:56,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:56,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:56,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:56,529 INFO L87 Difference]: Start difference. First operand 5042 states and 7761 transitions. Second operand 4 states. [2020-10-14 09:20:56,724 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:20:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:20:57,822 INFO L93 Difference]: Finished difference Result 14582 states and 22419 transitions. [2020-10-14 09:20:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:20:57,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-14 09:20:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:20:57,845 INFO L225 Difference]: With dead ends: 14582 [2020-10-14 09:20:57,845 INFO L226 Difference]: Without dead ends: 9588 [2020-10-14 09:20:57,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:20:57,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9588 states. [2020-10-14 09:20:58,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9588 to 9522. [2020-10-14 09:20:58,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9522 states. [2020-10-14 09:20:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9522 states to 9522 states and 14513 transitions. [2020-10-14 09:20:58,434 INFO L78 Accepts]: Start accepts. Automaton has 9522 states and 14513 transitions. Word has length 85 [2020-10-14 09:20:58,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:20:58,435 INFO L479 AbstractCegarLoop]: Abstraction has 9522 states and 14513 transitions. [2020-10-14 09:20:58,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:20:58,435 INFO L276 IsEmpty]: Start isEmpty. Operand 9522 states and 14513 transitions. [2020-10-14 09:20:58,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 09:20:58,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:20:58,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:20:58,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:20:58,437 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:20:58,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:20:58,437 INFO L82 PathProgramCache]: Analyzing trace with hash 880061571, now seen corresponding path program 1 times [2020-10-14 09:20:58,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:20:58,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341073795] [2020-10-14 09:20:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:20:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:58,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:58,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:58,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:58,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 09:20:58,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:20:58,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-14 09:20:58,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:58,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:58,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:20:58,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 09:20:58,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 09:20:58,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:20:59,160 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:20:59,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:20:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:20:59,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:20:59,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:20:59,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:20:59,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:20:59,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:20:59,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:20:59,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:20:59,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:20:59,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:20:59,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:20:59,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:20:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:20:59,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341073795] [2020-10-14 09:20:59,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:20:59,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:20:59,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765547036] [2020-10-14 09:20:59,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:20:59,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:20:59,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:20:59,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:20:59,198 INFO L87 Difference]: Start difference. First operand 9522 states and 14513 transitions. Second operand 4 states. [2020-10-14 09:20:59,390 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:21:00,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:21:00,914 INFO L93 Difference]: Finished difference Result 18361 states and 28087 transitions. [2020-10-14 09:21:00,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:21:00,914 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-10-14 09:21:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:21:00,950 INFO L225 Difference]: With dead ends: 18361 [2020-10-14 09:21:00,951 INFO L226 Difference]: Without dead ends: 13366 [2020-10-14 09:21:00,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:21:00,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13366 states. [2020-10-14 09:21:01,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13366 to 13364. [2020-10-14 09:21:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13364 states. [2020-10-14 09:21:01,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13364 states to 13364 states and 20307 transitions. [2020-10-14 09:21:01,696 INFO L78 Accepts]: Start accepts. Automaton has 13364 states and 20307 transitions. Word has length 86 [2020-10-14 09:21:01,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:21:01,697 INFO L479 AbstractCegarLoop]: Abstraction has 13364 states and 20307 transitions. [2020-10-14 09:21:01,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:21:01,697 INFO L276 IsEmpty]: Start isEmpty. Operand 13364 states and 20307 transitions. [2020-10-14 09:21:01,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 09:21:01,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:21:01,705 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:21:01,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:21:01,706 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:21:01,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:21:01,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1103545656, now seen corresponding path program 1 times [2020-10-14 09:21:01,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:21:01,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806424269] [2020-10-14 09:21:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:21:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:01,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:02,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:02,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:02,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 09:21:02,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:21:02,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1065 [2020-10-14 09:21:02,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:02,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:02,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:21:02,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:21:02,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 09:21:02,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:03,152 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:21:03,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:21:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:03,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:03,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:03,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:21:03,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:21:03,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 09:21:03,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:03,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:03,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:21:03,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:21:03,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:21:03,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:21:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 09:21:03,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806424269] [2020-10-14 09:21:03,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:21:03,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 09:21:03,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398070218] [2020-10-14 09:21:03,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:21:03,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:21:03,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:21:03,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:21:03,262 INFO L87 Difference]: Start difference. First operand 13364 states and 20307 transitions. Second operand 5 states. [2020-10-14 09:21:03,594 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-14 09:21:05,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:21:05,907 INFO L93 Difference]: Finished difference Result 30842 states and 46998 transitions. [2020-10-14 09:21:05,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 09:21:05,908 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2020-10-14 09:21:05,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:21:05,955 INFO L225 Difference]: With dead ends: 30842 [2020-10-14 09:21:05,956 INFO L226 Difference]: Without dead ends: 22008 [2020-10-14 09:21:05,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:21:06,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22008 states. [2020-10-14 09:21:07,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22008 to 21940. [2020-10-14 09:21:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21940 states. [2020-10-14 09:21:07,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21940 states to 21940 states and 33235 transitions. [2020-10-14 09:21:07,187 INFO L78 Accepts]: Start accepts. Automaton has 21940 states and 33235 transitions. Word has length 116 [2020-10-14 09:21:07,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:21:07,188 INFO L479 AbstractCegarLoop]: Abstraction has 21940 states and 33235 transitions. [2020-10-14 09:21:07,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:21:07,188 INFO L276 IsEmpty]: Start isEmpty. Operand 21940 states and 33235 transitions. [2020-10-14 09:21:07,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 09:21:07,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:21:07,196 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:21:07,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:21:07,197 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:21:07,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:21:07,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1285392368, now seen corresponding path program 1 times [2020-10-14 09:21:07,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:21:07,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619128524] [2020-10-14 09:21:07,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:21:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:07,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:07,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:07,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:08,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:08,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:08,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:12,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:12,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 09:21:12,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:21:12,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:21:12,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:12,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:12,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:21:12,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-14 09:21:12,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 09:21:12,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:12,458 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:21:12,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:21:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:12,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:12,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:12,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:21:12,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:21:12,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:21:12,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:12,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:12,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:21:12,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:21:12,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:21:12,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:21:12,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619128524] [2020-10-14 09:21:12,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:21:12,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:21:12,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471840531] [2020-10-14 09:21:12,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:21:12,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:21:12,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:21:12,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:21:12,519 INFO L87 Difference]: Start difference. First operand 21940 states and 33235 transitions. Second operand 4 states. [2020-10-14 09:21:12,761 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:21:15,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:21:15,264 INFO L93 Difference]: Finished difference Result 63960 states and 96725 transitions. [2020-10-14 09:21:15,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:21:15,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-10-14 09:21:15,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:21:15,327 INFO L225 Difference]: With dead ends: 63960 [2020-10-14 09:21:15,328 INFO L226 Difference]: Without dead ends: 42070 [2020-10-14 09:21:15,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:21:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42070 states. [2020-10-14 09:21:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42070 to 42068. [2020-10-14 09:21:17,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42068 states. [2020-10-14 09:21:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42068 states to 42068 states and 63219 transitions. [2020-10-14 09:21:17,699 INFO L78 Accepts]: Start accepts. Automaton has 42068 states and 63219 transitions. Word has length 116 [2020-10-14 09:21:17,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:21:17,699 INFO L479 AbstractCegarLoop]: Abstraction has 42068 states and 63219 transitions. [2020-10-14 09:21:17,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:21:17,699 INFO L276 IsEmpty]: Start isEmpty. Operand 42068 states and 63219 transitions. [2020-10-14 09:21:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 09:21:17,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:21:17,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:21:17,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:21:17,711 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:21:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:21:17,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1891104997, now seen corresponding path program 1 times [2020-10-14 09:21:17,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:21:17,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265718111] [2020-10-14 09:21:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:21:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:17,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:17,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:17,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:17,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:18,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:18,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:20,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:22,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:22,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 09:21:22,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:21:22,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:21:22,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:22,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:22,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:21:22,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-14 09:21:22,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 09:21:22,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:22,942 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:21:22,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:21:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:22,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:22,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:22,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:21:22,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:21:22,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:21:22,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:22,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:22,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:21:22,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:21:22,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:21:22,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:21:22,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265718111] [2020-10-14 09:21:22,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:21:22,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:21:22,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000640429] [2020-10-14 09:21:22,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:21:22,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:21:22,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:21:22,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:21:22,982 INFO L87 Difference]: Start difference. First operand 42068 states and 63219 transitions. Second operand 4 states. [2020-10-14 09:21:23,186 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:21:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:21:28,060 INFO L93 Difference]: Finished difference Result 122584 states and 183797 transitions. [2020-10-14 09:21:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:21:28,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-10-14 09:21:28,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:21:28,164 INFO L225 Difference]: With dead ends: 122584 [2020-10-14 09:21:28,165 INFO L226 Difference]: Without dead ends: 80566 [2020-10-14 09:21:28,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:21:28,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80566 states. [2020-10-14 09:21:33,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80566 to 80564. [2020-10-14 09:21:33,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80564 states. [2020-10-14 09:21:33,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80564 states to 80564 states and 119987 transitions. [2020-10-14 09:21:33,890 INFO L78 Accepts]: Start accepts. Automaton has 80564 states and 119987 transitions. Word has length 116 [2020-10-14 09:21:33,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:21:33,890 INFO L479 AbstractCegarLoop]: Abstraction has 80564 states and 119987 transitions. [2020-10-14 09:21:33,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:21:33,891 INFO L276 IsEmpty]: Start isEmpty. Operand 80564 states and 119987 transitions. [2020-10-14 09:21:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 09:21:33,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:21:33,904 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:21:33,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:21:33,904 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:21:33,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:21:33,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1509677648, now seen corresponding path program 1 times [2020-10-14 09:21:33,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:21:33,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830638165] [2020-10-14 09:21:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:21:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:33,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:33,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:34,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:34,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:34,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:34,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:36,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:38,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:38,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 09:21:38,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:21:38,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:21:38,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:38,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:38,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:21:38,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-14 09:21:38,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 09:21:38,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:39,133 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:21:39,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:21:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:39,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:39,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:21:39,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:21:39,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:21:39,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:21:39,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:21:39,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:21:39,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:21:39,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:21:39,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:21:39,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:21:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:21:39,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830638165] [2020-10-14 09:21:39,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:21:39,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:21:39,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571381201] [2020-10-14 09:21:39,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:21:39,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:21:39,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:21:39,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:21:39,174 INFO L87 Difference]: Start difference. First operand 80564 states and 119987 transitions. Second operand 4 states. [2020-10-14 09:21:39,386 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:21:49,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:21:49,399 INFO L93 Difference]: Finished difference Result 234552 states and 348341 transitions. [2020-10-14 09:21:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:21:49,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-10-14 09:21:49,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:21:49,575 INFO L225 Difference]: With dead ends: 234552 [2020-10-14 09:21:49,575 INFO L226 Difference]: Without dead ends: 154038 [2020-10-14 09:21:49,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:21:49,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154038 states. [2020-10-14 09:21:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154038 to 154036. [2020-10-14 09:21:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154036 states. [2020-10-14 09:21:57,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154036 states to 154036 states and 227123 transitions. [2020-10-14 09:21:57,512 INFO L78 Accepts]: Start accepts. Automaton has 154036 states and 227123 transitions. Word has length 116 [2020-10-14 09:21:57,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:21:57,512 INFO L479 AbstractCegarLoop]: Abstraction has 154036 states and 227123 transitions. [2020-10-14 09:21:57,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:21:57,512 INFO L276 IsEmpty]: Start isEmpty. Operand 154036 states and 227123 transitions. [2020-10-14 09:21:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 09:21:57,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:21:57,535 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:21:57,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:21:57,535 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:21:57,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:21:57,536 INFO L82 PathProgramCache]: Analyzing trace with hash 31226799, now seen corresponding path program 1 times [2020-10-14 09:21:57,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:21:57,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240096470] [2020-10-14 09:21:57,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:21:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:21:57,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:57,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:57,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:21:57,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:00,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:01,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:01,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:02,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:22:02,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 09:22:02,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:22:02,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 09:22:02,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:22:02,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:22:02,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:22:02,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-14 09:22:02,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:22:02,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:22:02,762 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:22:02,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:22:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:22:02,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:02,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:22:02,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:22:02,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:22:02,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:22:02,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:22:02,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:22:02,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:22:02,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:22:02,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:22:02,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:22:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:22:02,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240096470] [2020-10-14 09:22:02,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:22:02,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:22:02,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653785045] [2020-10-14 09:22:02,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:22:02,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:22:02,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:22:02,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:22:02,790 INFO L87 Difference]: Start difference. First operand 154036 states and 227123 transitions. Second operand 4 states. [2020-10-14 09:22:02,993 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:22:18,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:22:18,878 INFO L93 Difference]: Finished difference Result 447928 states and 658229 transitions. [2020-10-14 09:22:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:22:18,880 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-10-14 09:22:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:22:19,289 INFO L225 Difference]: With dead ends: 447928 [2020-10-14 09:22:19,289 INFO L226 Difference]: Without dead ends: 293942 [2020-10-14 09:22:19,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:22:19,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293942 states. [2020-10-14 09:22:41,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293942 to 293940. [2020-10-14 09:22:41,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293940 states. [2020-10-14 09:22:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293940 states to 293940 states and 428595 transitions. [2020-10-14 09:22:41,964 INFO L78 Accepts]: Start accepts. Automaton has 293940 states and 428595 transitions. Word has length 116 [2020-10-14 09:22:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:22:41,964 INFO L479 AbstractCegarLoop]: Abstraction has 293940 states and 428595 transitions. [2020-10-14 09:22:41,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:22:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 293940 states and 428595 transitions. [2020-10-14 09:22:42,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 09:22:42,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:22:42,008 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:22:42,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:22:42,009 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:22:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:22:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash -455609032, now seen corresponding path program 1 times [2020-10-14 09:22:42,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:22:42,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133635094] [2020-10-14 09:22:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:22:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:22:42,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:42,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:42,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:42,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:42,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:42,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:43,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:47,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:22:47,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 09:22:47,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:22:47,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:22:47,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:22:47,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:22:47,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:22:47,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-14 09:22:47,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 09:22:47,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:22:47,263 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:22:47,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:22:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:22:47,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:22:47,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:22:47,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:22:47,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:22:47,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:22:47,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:22:47,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:22:47,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:22:47,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:22:47,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:22:47,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:22:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:22:47,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133635094] [2020-10-14 09:22:47,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:22:47,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:22:47,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981664508] [2020-10-14 09:22:47,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:22:47,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:22:47,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:22:47,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:22:47,292 INFO L87 Difference]: Start difference. First operand 293940 states and 428595 transitions. Second operand 4 states. [2020-10-14 09:23:04,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:23:04,601 INFO L93 Difference]: Finished difference Result 497221 states and 725378 transitions. [2020-10-14 09:23:04,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:23:04,601 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-10-14 09:23:04,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:23:04,872 INFO L225 Difference]: With dead ends: 497221 [2020-10-14 09:23:04,872 INFO L226 Difference]: Without dead ends: 203331 [2020-10-14 09:23:05,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:23:05,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203331 states. [2020-10-14 09:23:20,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203331 to 203329. [2020-10-14 09:23:20,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203329 states. [2020-10-14 09:23:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203329 states to 203329 states and 294768 transitions. [2020-10-14 09:23:20,970 INFO L78 Accepts]: Start accepts. Automaton has 203329 states and 294768 transitions. Word has length 116 [2020-10-14 09:23:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:23:20,970 INFO L479 AbstractCegarLoop]: Abstraction has 203329 states and 294768 transitions. [2020-10-14 09:23:20,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:23:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 203329 states and 294768 transitions. [2020-10-14 09:23:20,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-14 09:23:20,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:20,990 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:23:20,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:23:20,990 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:20,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:20,990 INFO L82 PathProgramCache]: Analyzing trace with hash 308362475, now seen corresponding path program 1 times [2020-10-14 09:23:20,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:20,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428165088] [2020-10-14 09:23:20,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:21,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:21,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:21,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:21,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:22,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:26,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:26,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-14 09:23:26,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:23:26,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-14 09:23:26,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:26,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:26,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:23:26,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-14 09:23:26,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 09:23:26,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:23:26,263 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:23:26,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:23:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:26,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:26,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:26,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:23:26,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:23:26,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:23:26,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:26,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:26,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:23:26,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:23:26,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:23:26,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:23:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:23:26,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428165088] [2020-10-14 09:23:26,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:23:26,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:23:26,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591793645] [2020-10-14 09:23:26,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:23:26,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:23:26,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:23:26,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:23:26,298 INFO L87 Difference]: Start difference. First operand 203329 states and 294768 transitions. Second operand 4 states. [2020-10-14 09:23:26,513 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 170