/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:10:56,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:10:56,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:10:56,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:10:56,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:10:56,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:10:56,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:10:56,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:10:56,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:10:56,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:10:56,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:10:56,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:10:56,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:10:56,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:10:56,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:10:56,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:10:56,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:10:56,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:10:56,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:10:56,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:10:56,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:10:56,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:10:56,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:10:56,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:10:56,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:10:56,099 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:10:56,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:10:56,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:10:56,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:10:56,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:10:56,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:10:56,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:10:56,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:10:56,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:10:56,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:10:56,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:10:56,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:10:56,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:10:56,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:10:56,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:10:56,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:10:56,111 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 09:10:56,137 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:10:56,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:10:56,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:10:56,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:10:56,139 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:10:56,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:10:56,140 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:10:56,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:10:56,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:10:56,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:10:56,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:10:56,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:10:56,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:10:56,141 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:10:56,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:10:56,141 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:10:56,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:10:56,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:10:56,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:10:56,142 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:10:56,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:10:56,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:10:56,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:10:56,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:10:56,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:10:56,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:10:56,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:10:56,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:10:56,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:10:56,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 09:10:56,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:10:56,628 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:10:56,632 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:10:56,634 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:10:56,635 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:10:56,636 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-09-25 09:10:56,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/802b54238/1089b7bdf461407aa8e87a6ecab682f7/FLAG504ea508d [2020-09-25 09:10:57,286 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:10:57,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-09-25 09:10:57,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/802b54238/1089b7bdf461407aa8e87a6ecab682f7/FLAG504ea508d [2020-09-25 09:10:57,637 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/802b54238/1089b7bdf461407aa8e87a6ecab682f7 [2020-09-25 09:10:57,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:10:57,658 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:10:57,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:10:57,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:10:57,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:10:57,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:10:57" (1/1) ... [2020-09-25 09:10:57,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23bccf0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:57, skipping insertion in model container [2020-09-25 09:10:57,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:10:57" (1/1) ... [2020-09-25 09:10:57,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:10:57,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:10:57,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:10:57,930 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:10:57,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:10:57,967 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:10:57,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:57 WrapperNode [2020-09-25 09:10:57,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:10:57,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:10:57,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:10:57,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:10:57,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:57" (1/1) ... [2020-09-25 09:10:57,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:57" (1/1) ... [2020-09-25 09:10:58,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:57" (1/1) ... [2020-09-25 09:10:58,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:57" (1/1) ... [2020-09-25 09:10:58,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:57" (1/1) ... [2020-09-25 09:10:58,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:57" (1/1) ... [2020-09-25 09:10:58,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:57" (1/1) ... [2020-09-25 09:10:58,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:10:58,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:10:58,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:10:58,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:10:58,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:10:58,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:10:58,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:10:58,164 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 09:10:58,164 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 09:10:58,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:10:58,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:10:58,164 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 09:10:58,165 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 09:10:58,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 09:10:58,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 09:10:58,166 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:10:58,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:10:58,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:10:58,552 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:10:58,552 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 09:10:58,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:10:58 BoogieIcfgContainer [2020-09-25 09:10:58,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:10:58,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:10:58,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:10:58,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:10:58,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:10:57" (1/3) ... [2020-09-25 09:10:58,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b58135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:10:58, skipping insertion in model container [2020-09-25 09:10:58,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:57" (2/3) ... [2020-09-25 09:10:58,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b58135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:10:58, skipping insertion in model container [2020-09-25 09:10:58,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:10:58" (3/3) ... [2020-09-25 09:10:58,568 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2020-09-25 09:10:58,580 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:10:58,591 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:10:58,613 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:10:58,644 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:10:58,644 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:10:58,644 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:10:58,645 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:10:58,645 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:10:58,645 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:10:58,645 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:10:58,645 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:10:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-09-25 09:10:58,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-25 09:10:58,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:58,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:58,678 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:58,684 INFO L82 PathProgramCache]: Analyzing trace with hash -537390573, now seen corresponding path program 1 times [2020-09-25 09:10:58,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:58,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755245358] [2020-09-25 09:10:58,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:58,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:58,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:58,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:58,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-25 09:10:58,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:58,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-09-25 09:10:58,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:58,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:58,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:58,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 09:10:58,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:58,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 09:10:59,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:59,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:59,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:59,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:59,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:59,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 09:10:59,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:59,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:59,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:59,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:59,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:59,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:59,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755245358] [2020-09-25 09:10:59,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:10:59,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 09:10:59,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637411810] [2020-09-25 09:10:59,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 09:10:59,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:59,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 09:10:59,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 09:10:59,086 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 2 states. [2020-09-25 09:10:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:59,127 INFO L93 Difference]: Finished difference Result 134 states and 203 transitions. [2020-09-25 09:10:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 09:10:59,129 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-09-25 09:10:59,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:59,142 INFO L225 Difference]: With dead ends: 134 [2020-09-25 09:10:59,142 INFO L226 Difference]: Without dead ends: 69 [2020-09-25 09:10:59,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 09:10:59,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-25 09:10:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-09-25 09:10:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-25 09:10:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2020-09-25 09:10:59,206 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 19 [2020-09-25 09:10:59,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:59,207 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2020-09-25 09:10:59,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 09:10:59,207 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2020-09-25 09:10:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 09:10:59,208 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:59,208 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] [2020-09-25 09:10:59,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:10:59,209 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:59,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:59,210 INFO L82 PathProgramCache]: Analyzing trace with hash 471335344, now seen corresponding path program 1 times [2020-09-25 09:10:59,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:59,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100273094] [2020-09-25 09:10:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:59,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:59,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:59,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:59,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 09:10:59,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:59,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-09-25 09:10:59,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:59,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:59,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:10:59,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 09:10:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 09:10:59,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:59,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:59,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:59,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:59,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:59,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:59,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:59,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:59,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:59,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:59,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:59,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:59,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:59,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100273094] [2020-09-25 09:10:59,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:10:59,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 09:10:59,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826002208] [2020-09-25 09:10:59,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:10:59,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:59,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:10:59,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:10:59,560 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand 7 states. [2020-09-25 09:10:59,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:59,860 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2020-09-25 09:10:59,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 09:10:59,861 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-25 09:10:59,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:59,863 INFO L225 Difference]: With dead ends: 89 [2020-09-25 09:10:59,864 INFO L226 Difference]: Without dead ends: 87 [2020-09-25 09:10:59,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 09:10:59,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-25 09:10:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2020-09-25 09:10:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-25 09:10:59,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2020-09-25 09:10:59,887 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 20 [2020-09-25 09:10:59,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:59,887 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2020-09-25 09:10:59,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:10:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2020-09-25 09:10:59,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 09:10:59,889 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:59,889 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:59,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:10:59,890 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:59,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:59,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1383579147, now seen corresponding path program 1 times [2020-09-25 09:10:59,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:59,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164442908] [2020-09-25 09:10:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:59,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:59,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:00,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:00,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 09:11:00,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:11:00,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-09-25 09:11:00,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:00,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:11:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 09:11:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 09:11:00,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:00,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:00,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:00,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:00,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:00,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:00,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:11:00,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:00,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:00,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:00,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:00,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:00,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:00,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-25 09:11:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:00,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:00,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:00,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:00,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:00,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:11:00,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:00,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:00,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:00,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:00,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:00,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:11:00,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164442908] [2020-09-25 09:11:00,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:11:00,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 09:11:00,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346313723] [2020-09-25 09:11:00,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:11:00,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:00,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:11:00,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:11:00,293 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand 7 states. [2020-09-25 09:11:00,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:00,469 INFO L93 Difference]: Finished difference Result 93 states and 115 transitions. [2020-09-25 09:11:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 09:11:00,470 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-09-25 09:11:00,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:00,472 INFO L225 Difference]: With dead ends: 93 [2020-09-25 09:11:00,472 INFO L226 Difference]: Without dead ends: 85 [2020-09-25 09:11:00,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:11:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-25 09:11:00,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-09-25 09:11:00,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-25 09:11:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2020-09-25 09:11:00,487 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 25 [2020-09-25 09:11:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:00,488 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2020-09-25 09:11:00,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:11:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2020-09-25 09:11:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 09:11:00,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:00,490 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:11:00,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:11:00,491 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:00,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:00,491 INFO L82 PathProgramCache]: Analyzing trace with hash 859677550, now seen corresponding path program 1 times [2020-09-25 09:11:00,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:00,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078038483] [2020-09-25 09:11:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:00,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:00,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:00,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:00,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 09:11:00,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:11:00,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-09-25 09:11:00,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:00,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:00,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:11:00,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 09:11:00,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 09:11:00,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:00,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:00,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:00,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:00,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:00,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:00,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 09:11:00,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:00,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:00,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:00,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 09:11:00,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 09:11:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:00,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:01,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:01,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:01,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:01,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:11:01,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 09:11:01,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:01,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:01,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:11:01,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:01,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 09:11:01,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:01,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 09:11:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:01,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:01,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:01,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:01,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:01,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 09:11:01,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:01,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:01,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:01,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:01,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:01,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 09:11:01,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078038483] [2020-09-25 09:11:01,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:01,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 09:11:01,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255522313] [2020-09-25 09:11:01,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 09:11:01,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:01,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 09:11:01,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 09:11:01,074 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 8 states. [2020-09-25 09:11:01,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:01,381 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2020-09-25 09:11:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 09:11:01,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-09-25 09:11:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:01,385 INFO L225 Difference]: With dead ends: 89 [2020-09-25 09:11:01,385 INFO L226 Difference]: Without dead ends: 87 [2020-09-25 09:11:01,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:11:01,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-25 09:11:01,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-09-25 09:11:01,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-25 09:11:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2020-09-25 09:11:01,416 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 41 [2020-09-25 09:11:01,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:01,417 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2020-09-25 09:11:01,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 09:11:01,418 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2020-09-25 09:11:01,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 09:11:01,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:01,424 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:11:01,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:11:01,425 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:01,426 INFO L82 PathProgramCache]: Analyzing trace with hash -943144682, now seen corresponding path program 1 times [2020-09-25 09:11:01,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:01,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634727266] [2020-09-25 09:11:01,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:01,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:01,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:01,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:01,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 09:11:01,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:11:01,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-09-25 09:11:01,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:01,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:01,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:11:01,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 09:11:01,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 09:11:01,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 09:11:01,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:01,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:01,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:01,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:01,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:01,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 09:11:01,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:01,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:01,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:01,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:01,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:01,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:01,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 09:11:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:01,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:01,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:01,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:01,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:01,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:11:01,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 09:11:01,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:01,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:01,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:11:01,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:01,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 09:11:01,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:01,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 09:11:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:01,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:01,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:01,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:01,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:01,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 09:11:01,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:01,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:01,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:01,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:01,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:01,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 09:11:01,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634727266] [2020-09-25 09:11:01,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:01,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:11:01,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106406092] [2020-09-25 09:11:01,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:11:01,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:01,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:11:01,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:11:01,971 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand 9 states. [2020-09-25 09:11:02,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:02,253 INFO L93 Difference]: Finished difference Result 113 states and 135 transitions. [2020-09-25 09:11:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 09:11:02,254 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-09-25 09:11:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:02,258 INFO L225 Difference]: With dead ends: 113 [2020-09-25 09:11:02,258 INFO L226 Difference]: Without dead ends: 111 [2020-09-25 09:11:02,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-25 09:11:02,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-25 09:11:02,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2020-09-25 09:11:02,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-25 09:11:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2020-09-25 09:11:02,274 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 44 [2020-09-25 09:11:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:02,274 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2020-09-25 09:11:02,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:11:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2020-09-25 09:11:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 09:11:02,276 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:02,277 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:11:02,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:11:02,277 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:02,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1177695863, now seen corresponding path program 2 times [2020-09-25 09:11:02,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:02,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34762552] [2020-09-25 09:11:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:02,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:02,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:03,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:03,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 09:11:03,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:11:03,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 713 [2020-09-25 09:11:03,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:03,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:03,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 09:11:03,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 09:11:03,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 09:11:03,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-25 09:11:03,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:03,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:03,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:03,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:03,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:03,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:11:03,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:03,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:03,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:03,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:03,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:03,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:03,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 09:11:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:03,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:03,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:03,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:03,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:03,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 09:11:03,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:03,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:03,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:03,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:03,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:03,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:03,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 09:11:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:03,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:03,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:03,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:03,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:03,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 09:11:03,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:03,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:03,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:03,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:03,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:03,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:03,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-25 09:11:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:03,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:03,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:03,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:03,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:03,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 09:11:03,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:03,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:03,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:03,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:03,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:03,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 09:11:03,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34762552] [2020-09-25 09:11:03,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:03,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:11:03,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988149373] [2020-09-25 09:11:03,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:11:03,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:03,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:11:03,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:11:03,231 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand 9 states. [2020-09-25 09:11:03,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:03,507 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2020-09-25 09:11:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:11:03,507 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-09-25 09:11:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:03,509 INFO L225 Difference]: With dead ends: 129 [2020-09-25 09:11:03,509 INFO L226 Difference]: Without dead ends: 127 [2020-09-25 09:11:03,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-25 09:11:03,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-25 09:11:03,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2020-09-25 09:11:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-25 09:11:03,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2020-09-25 09:11:03,524 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 46 [2020-09-25 09:11:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:03,524 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2020-09-25 09:11:03,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:11:03,524 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2020-09-25 09:11:03,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 09:11:03,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:03,526 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:11:03,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 09:11:03,527 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:03,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:03,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1826770767, now seen corresponding path program 1 times [2020-09-25 09:11:03,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:03,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137416683] [2020-09-25 09:11:03,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:03,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:03,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:04,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:04,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 09:11:04,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:11:04,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-09-25 09:11:04,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:04,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 09:11:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 09:11:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-25 09:11:04,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:04,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:04,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:04,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:04,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:04,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:04,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:04,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:04,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:04,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:04,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:04,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:04,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:04,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 09:11:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:04,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:04,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:04,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:04,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:04,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 09:11:04,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:04,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:04,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:04,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:04,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:04,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:04,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 09:11:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:04,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:04,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:04,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:04,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:04,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 09:11:04,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:04,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:04,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:04,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:04,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:04,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:04,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 09:11:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:04,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:04,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:04,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:04,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:04,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:11:04,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:04,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:04,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:04,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:04,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:04,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 09:11:04,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137416683] [2020-09-25 09:11:04,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:11:04,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 09:11:04,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842138621] [2020-09-25 09:11:04,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:11:04,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:04,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:11:04,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:11:04,775 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand 9 states. [2020-09-25 09:11:05,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:05,082 INFO L93 Difference]: Finished difference Result 154 states and 185 transitions. [2020-09-25 09:11:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 09:11:05,082 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 09:11:05,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:05,084 INFO L225 Difference]: With dead ends: 154 [2020-09-25 09:11:05,085 INFO L226 Difference]: Without dead ends: 149 [2020-09-25 09:11:05,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-25 09:11:05,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-25 09:11:05,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2020-09-25 09:11:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-25 09:11:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 174 transitions. [2020-09-25 09:11:05,099 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 174 transitions. Word has length 49 [2020-09-25 09:11:05,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:05,100 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 174 transitions. [2020-09-25 09:11:05,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:11:05,100 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 174 transitions. [2020-09-25 09:11:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 09:11:05,102 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:05,102 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:11:05,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 09:11:05,102 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:05,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:05,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1519048418, now seen corresponding path program 1 times [2020-09-25 09:11:05,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:05,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592126896] [2020-09-25 09:11:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:05,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:05,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:05,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:06,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:06,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 09:11:06,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:11:06,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1491 [2020-09-25 09:11:06,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:06,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:06,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:11:06,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 09:11:06,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 09:11:06,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:06,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:06,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:06,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:06,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:06,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:06,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:11:06,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:06,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:06,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:06,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 09:11:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:06,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:06,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:06,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:06,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:06,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:11:06,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 09:11:06,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:06,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:06,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:11:06,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:06,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 09:11:06,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:06,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 09:11:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:06,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:06,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:06,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:06,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:06,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 09:11:06,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:06,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:06,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:06,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:06,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:06,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:06,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 09:11:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:06,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:06,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:06,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:06,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:06,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 09:11:06,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:06,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:06,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:06,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:06,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:06,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:06,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 09:11:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:06,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:06,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:06,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:06,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:06,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 09:11:06,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:06,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:06,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:06,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:06,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:06,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-25 09:11:06,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592126896] [2020-09-25 09:11:06,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:06,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 09:11:06,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108790335] [2020-09-25 09:11:06,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 09:11:06,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:06,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 09:11:06,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-25 09:11:06,796 INFO L87 Difference]: Start difference. First operand 145 states and 174 transitions. Second operand 10 states. [2020-09-25 09:11:07,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:07,075 INFO L93 Difference]: Finished difference Result 162 states and 195 transitions. [2020-09-25 09:11:07,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 09:11:07,076 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-09-25 09:11:07,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:07,078 INFO L225 Difference]: With dead ends: 162 [2020-09-25 09:11:07,079 INFO L226 Difference]: Without dead ends: 160 [2020-09-25 09:11:07,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-25 09:11:07,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-25 09:11:07,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 151. [2020-09-25 09:11:07,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-25 09:11:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 182 transitions. [2020-09-25 09:11:07,104 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 182 transitions. Word has length 58 [2020-09-25 09:11:07,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:07,106 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 182 transitions. [2020-09-25 09:11:07,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 09:11:07,106 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 182 transitions. [2020-09-25 09:11:07,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-25 09:11:07,109 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:07,109 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:11:07,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 09:11:07,110 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:07,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:07,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1967257859, now seen corresponding path program 1 times [2020-09-25 09:11:07,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:07,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93908006] [2020-09-25 09:11:07,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:07,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:07,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:07,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:12,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:12,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-25 09:11:12,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:11:12,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 09:11:12,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:12,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:12,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 09:11:12,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 09:11:12,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-25 09:11:12,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:12,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:12,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:12,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:12,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:12,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:12,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:11:12,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:12,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:12,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:12,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:12,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:12,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:12,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 09:11:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:12,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:12,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:12,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:12,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:12,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:11:12,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:12,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:12,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:12,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:12,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:12,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:12,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 09:11:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:12,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:12,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:12,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:12,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:12,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:11:12,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:12,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:12,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:12,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:12,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:12,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:12,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 09:11:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:12,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:12,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:12,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:12,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:12,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 09:11:12,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:12,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:12,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:12,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:12,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:12,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:12,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 09:11:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:12,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:12,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:12,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:12,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:12,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 09:11:12,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:12,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:12,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:12,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:12,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:12,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:12,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-25 09:11:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:12,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:12,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:12,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:12,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:12,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:11:12,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:12,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:12,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:12,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:12,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:12,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-25 09:11:12,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93908006] [2020-09-25 09:11:12,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:11:12,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-25 09:11:12,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175290570] [2020-09-25 09:11:12,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 09:11:12,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:12,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 09:11:12,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-25 09:11:12,448 INFO L87 Difference]: Start difference. First operand 151 states and 182 transitions. Second operand 12 states. [2020-09-25 09:11:12,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:12,879 INFO L93 Difference]: Finished difference Result 167 states and 199 transitions. [2020-09-25 09:11:12,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 09:11:12,880 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-09-25 09:11:12,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:12,884 INFO L225 Difference]: With dead ends: 167 [2020-09-25 09:11:12,884 INFO L226 Difference]: Without dead ends: 165 [2020-09-25 09:11:12,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-09-25 09:11:12,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-25 09:11:12,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2020-09-25 09:11:12,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-25 09:11:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 193 transitions. [2020-09-25 09:11:12,904 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 193 transitions. Word has length 63 [2020-09-25 09:11:12,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:12,906 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 193 transitions. [2020-09-25 09:11:12,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 09:11:12,906 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 193 transitions. [2020-09-25 09:11:12,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-25 09:11:12,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:12,909 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:11:12,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 09:11:12,910 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:12,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:12,910 INFO L82 PathProgramCache]: Analyzing trace with hash 659292836, now seen corresponding path program 3 times [2020-09-25 09:11:12,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:12,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851702439] [2020-09-25 09:11:12,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:12,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:13,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:13,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:17,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:17,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-25 09:11:17,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:11:17,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4565 [2020-09-25 09:11:17,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:17,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:17,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 09:11:17,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 09:11:17,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-25 09:11:17,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:17,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:17,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:17,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:17,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:17,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:17,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:17,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:17,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:17,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:17,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:17,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:17,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:17,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 09:11:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:17,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:17,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:17,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:17,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:17,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 09:11:17,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:17,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:17,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:17,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:17,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:17,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:17,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 09:11:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:17,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:17,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:17,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:17,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:17,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 09:11:17,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:17,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:17,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:17,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:17,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:17,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:17,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-25 09:11:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:17,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:17,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:17,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:17,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:17,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 09:11:17,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:17,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:17,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:17,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:17,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:17,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:17,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 09:11:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:17,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:17,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:17,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:17,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:17,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 09:11:17,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:17,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:17,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:17,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:17,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:17,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:17,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-25 09:11:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:17,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:17,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:17,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:17,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:17,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 09:11:17,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:17,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:17,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:17,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:17,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:17,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-09-25 09:11:17,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851702439] [2020-09-25 09:11:17,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:17,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:11:17,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153379020] [2020-09-25 09:11:17,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:11:17,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:17,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:11:17,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:11:17,781 INFO L87 Difference]: Start difference. First operand 161 states and 193 transitions. Second operand 11 states. [2020-09-25 09:11:18,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:18,125 INFO L93 Difference]: Finished difference Result 167 states and 198 transitions. [2020-09-25 09:11:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 09:11:18,127 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-09-25 09:11:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:18,129 INFO L225 Difference]: With dead ends: 167 [2020-09-25 09:11:18,129 INFO L226 Difference]: Without dead ends: 165 [2020-09-25 09:11:18,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-09-25 09:11:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-25 09:11:18,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2020-09-25 09:11:18,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-25 09:11:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 175 transitions. [2020-09-25 09:11:18,154 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 175 transitions. Word has length 64 [2020-09-25 09:11:18,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:18,155 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 175 transitions. [2020-09-25 09:11:18,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:11:18,155 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 175 transitions. [2020-09-25 09:11:18,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-25 09:11:18,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:18,157 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2020-09-25 09:11:18,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 09:11:18,158 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:18,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:18,158 INFO L82 PathProgramCache]: Analyzing trace with hash -822659134, now seen corresponding path program 1 times [2020-09-25 09:11:18,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:18,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922319934] [2020-09-25 09:11:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:18,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:18,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:18,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:19,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:19,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-25 09:11:19,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:11:19,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1258 [2020-09-25 09:11:19,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:19,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:19,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:11:19,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 09:11:19,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-25 09:11:19,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:19,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:19,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:19,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:19,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:19,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:19,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:19,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:19,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:19,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:19,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:19,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:19,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:19,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 09:11:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:19,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:19,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:19,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:19,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:19,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:19,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:19,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:19,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:19,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:19,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:19,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:19,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 09:11:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:19,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:19,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:19,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:19,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:19,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:11:19,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:19,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:19,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:19,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:19,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:19,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:19,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 09:11:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:19,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:19,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:19,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:19,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:19,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:19,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:19,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:19,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:19,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:19,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:19,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:19,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 09:11:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:19,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:19,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:19,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:19,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:19,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:11:19,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:19,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:19,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:19,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 09:11:19,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922319934] [2020-09-25 09:11:19,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:11:19,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 09:11:19,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257900837] [2020-09-25 09:11:19,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:11:19,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:19,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:11:19,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:11:19,571 INFO L87 Difference]: Start difference. First operand 148 states and 175 transitions. Second operand 9 states. [2020-09-25 09:11:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:19,778 INFO L93 Difference]: Finished difference Result 187 states and 220 transitions. [2020-09-25 09:11:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 09:11:19,780 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-09-25 09:11:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:19,783 INFO L225 Difference]: With dead ends: 187 [2020-09-25 09:11:19,783 INFO L226 Difference]: Without dead ends: 185 [2020-09-25 09:11:19,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-25 09:11:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-25 09:11:19,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 177. [2020-09-25 09:11:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-25 09:11:19,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 209 transitions. [2020-09-25 09:11:19,802 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 209 transitions. Word has length 65 [2020-09-25 09:11:19,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:19,802 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 209 transitions. [2020-09-25 09:11:19,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:11:19,802 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 209 transitions. [2020-09-25 09:11:19,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 09:11:19,804 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:19,804 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2020-09-25 09:11:19,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 09:11:19,804 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:19,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:19,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1510377470, now seen corresponding path program 1 times [2020-09-25 09:11:19,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:19,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133008015] [2020-09-25 09:11:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:19,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:19,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:19,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:23,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:23,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-25 09:11:23,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:11:23,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3566 [2020-09-25 09:11:23,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:23,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:23,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 09:11:23,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 09:11:23,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-09-25 09:11:23,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:23,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:23,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:23,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:23,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:23,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:23,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:23,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:23,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:23,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:23,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:23,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:23,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:23,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 09:11:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:23,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:23,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:23,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:23,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:23,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:23,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:23,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:23,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:23,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:23,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:23,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:23,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 09:11:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:23,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:23,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:23,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:23,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:23,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:23,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:23,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:23,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:23,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:23,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:23,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:23,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-25 09:11:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:23,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:23,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:23,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:23,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:23,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:11:23,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:23,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:23,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:23,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:23,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:23,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:23,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 09:11:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:23,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:23,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:23,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:23,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:23,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 09:11:23,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:23,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:23,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:23,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:23,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:23,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:23,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 09:11:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:23,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:23,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:23,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:23,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:23,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 09:11:23,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:23,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:23,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:23,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:23,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:23,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-25 09:11:23,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133008015] [2020-09-25 09:11:23,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:23,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:11:23,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550205734] [2020-09-25 09:11:23,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:11:23,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:23,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:11:23,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:11:23,590 INFO L87 Difference]: Start difference. First operand 177 states and 209 transitions. Second operand 11 states. [2020-09-25 09:11:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:23,952 INFO L93 Difference]: Finished difference Result 231 states and 274 transitions. [2020-09-25 09:11:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 09:11:23,952 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-09-25 09:11:23,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:23,955 INFO L225 Difference]: With dead ends: 231 [2020-09-25 09:11:23,955 INFO L226 Difference]: Without dead ends: 226 [2020-09-25 09:11:23,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-09-25 09:11:23,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-09-25 09:11:23,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 218. [2020-09-25 09:11:23,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-09-25 09:11:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 259 transitions. [2020-09-25 09:11:23,980 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 259 transitions. Word has length 67 [2020-09-25 09:11:23,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:23,980 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 259 transitions. [2020-09-25 09:11:23,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:11:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 259 transitions. [2020-09-25 09:11:23,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-25 09:11:23,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:23,988 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2020-09-25 09:11:23,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 09:11:23,988 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:23,989 INFO L82 PathProgramCache]: Analyzing trace with hash 869213219, now seen corresponding path program 2 times [2020-09-25 09:11:23,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:23,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872182077] [2020-09-25 09:11:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:24,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:24,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:24,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:28,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:28,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-25 09:11:28,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:11:28,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4184 [2020-09-25 09:11:28,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:28,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:28,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 09:11:28,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 09:11:28,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-25 09:11:28,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:28,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:28,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:28,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:28,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:28,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:28,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:28,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:28,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:28,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:28,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:28,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:28,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:28,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 09:11:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:28,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:28,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:28,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:28,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:28,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:11:28,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:28,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:28,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:28,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:28,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:28,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:28,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 09:11:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:28,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:28,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:28,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:28,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:28,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:11:28,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:28,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:28,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:28,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:28,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:28,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:28,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 09:11:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:28,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:28,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:28,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:28,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:28,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:11:28,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:28,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:28,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:28,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:28,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:28,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:28,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 09:11:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:28,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:28,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:28,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:28,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:28,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:11:28,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:28,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:28,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:28,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:28,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:28,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:28,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-25 09:11:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:28,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:28,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:28,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:28,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:28,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:28,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:28,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:28,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:28,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:28,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:28,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-25 09:11:28,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872182077] [2020-09-25 09:11:28,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:28,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 09:11:28,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420745234] [2020-09-25 09:11:28,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 09:11:28,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:28,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 09:11:28,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-25 09:11:28,484 INFO L87 Difference]: Start difference. First operand 218 states and 259 transitions. Second operand 12 states. [2020-09-25 09:11:28,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:28,820 INFO L93 Difference]: Finished difference Result 228 states and 269 transitions. [2020-09-25 09:11:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 09:11:28,820 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-09-25 09:11:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:28,822 INFO L225 Difference]: With dead ends: 228 [2020-09-25 09:11:28,822 INFO L226 Difference]: Without dead ends: 223 [2020-09-25 09:11:28,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-09-25 09:11:28,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-25 09:11:28,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2020-09-25 09:11:28,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-09-25 09:11:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 260 transitions. [2020-09-25 09:11:28,836 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 260 transitions. Word has length 70 [2020-09-25 09:11:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:28,837 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 260 transitions. [2020-09-25 09:11:28,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 09:11:28,837 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 260 transitions. [2020-09-25 09:11:28,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 09:11:28,838 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:28,839 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2020-09-25 09:11:28,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 09:11:28,839 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:28,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:28,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1147260786, now seen corresponding path program 1 times [2020-09-25 09:11:28,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:28,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888115178] [2020-09-25 09:11:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:28,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:28,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:28,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:29,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:33,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:33,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-25 09:11:33,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 09:11:33,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4939 [2020-09-25 09:11:33,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:33,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:33,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:11:33,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 09:11:33,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-25 09:11:33,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:33,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:33,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:33,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:33,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:33,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:33,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:33,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:33,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:33,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:33,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:33,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:33,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:33,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 09:11:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:33,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:33,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:33,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:33,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:33,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:33,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:33,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:33,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:33,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:33,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:33,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:33,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 09:11:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:33,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:33,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:33,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:33,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:33,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:11:33,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:33,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:33,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:33,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:33,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:33,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:33,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 09:11:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:33,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:33,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:33,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:33,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:33,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:33,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:33,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:33,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:33,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:33,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:33,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:33,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 09:11:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:33,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:33,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:33,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:33,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:33,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:11:33,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:33,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:33,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:33,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:33,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:33,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:33,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-25 09:11:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:33,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:33,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:33,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:33,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:33,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:33,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:33,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:33,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:33,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:33,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:33,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:33,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 09:11:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:33,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:33,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:33,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:33,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:33,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:33,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:33,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:33,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:33,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:33,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:33,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-09-25 09:11:33,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888115178] [2020-09-25 09:11:33,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:11:33,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-25 09:11:33,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358976301] [2020-09-25 09:11:33,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:11:33,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:33,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:11:33,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:11:33,945 INFO L87 Difference]: Start difference. First operand 221 states and 260 transitions. Second operand 11 states. [2020-09-25 09:11:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:34,229 INFO L93 Difference]: Finished difference Result 260 states and 308 transitions. [2020-09-25 09:11:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 09:11:34,230 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-09-25 09:11:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:34,232 INFO L225 Difference]: With dead ends: 260 [2020-09-25 09:11:34,232 INFO L226 Difference]: Without dead ends: 258 [2020-09-25 09:11:34,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-25 09:11:34,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-09-25 09:11:34,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 251. [2020-09-25 09:11:34,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-09-25 09:11:34,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 297 transitions. [2020-09-25 09:11:34,249 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 297 transitions. Word has length 79 [2020-09-25 09:11:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:34,249 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 297 transitions. [2020-09-25 09:11:34,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:11:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 297 transitions. [2020-09-25 09:11:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 09:11:34,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:34,251 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2020-09-25 09:11:34,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 09:11:34,251 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:34,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:34,252 INFO L82 PathProgramCache]: Analyzing trace with hash 341113206, now seen corresponding path program 2 times [2020-09-25 09:11:34,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:34,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602367611] [2020-09-25 09:11:34,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:34,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:34,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:34,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:34,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:39,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:39,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-25 09:11:39,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 09:11:39,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 09:11:39,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:39,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:11:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 09:11:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-25 09:11:39,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:39,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:39,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:39,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:39,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:39,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:39,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:11:39,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:39,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:39,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:39,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:39,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:39,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 09:11:39,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 09:11:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:39,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:39,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:39,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:39,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:39,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:11:39,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:39,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:39,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:39,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:39,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:39,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:39,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 09:11:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:39,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:39,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:39,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:39,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:39,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 09:11:39,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:39,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:39,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:39,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:39,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:39,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:39,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 09:11:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:39,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:39,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:39,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:39,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:39,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:11:39,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:39,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:39,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:39,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:39,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:39,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:39,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 09:11:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:39,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:39,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:39,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:39,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:39,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:11:39,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:39,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:39,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:39,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:39,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:39,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:39,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-25 09:11:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:39,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:39,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:39,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:39,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:39,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:11:39,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:39,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:39,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:39,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:39,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:39,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:39,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-25 09:11:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:39,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:39,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:39,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:39,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:39,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:11:39,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:39,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:39,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:39,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:39,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:39,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-09-25 09:11:39,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602367611] [2020-09-25 09:11:39,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:11:39,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-25 09:11:39,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509432007] [2020-09-25 09:11:39,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:11:39,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:39,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:11:39,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:11:39,474 INFO L87 Difference]: Start difference. First operand 251 states and 297 transitions. Second operand 11 states. [2020-09-25 09:11:39,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:39,856 INFO L93 Difference]: Finished difference Result 292 states and 347 transitions. [2020-09-25 09:11:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 09:11:39,857 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-09-25 09:11:39,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:39,861 INFO L225 Difference]: With dead ends: 292 [2020-09-25 09:11:39,862 INFO L226 Difference]: Without dead ends: 290 [2020-09-25 09:11:39,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-25 09:11:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-25 09:11:39,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 281. [2020-09-25 09:11:39,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-09-25 09:11:39,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 334 transitions. [2020-09-25 09:11:39,894 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 334 transitions. Word has length 79 [2020-09-25 09:11:39,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:39,895 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 334 transitions. [2020-09-25 09:11:39,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:11:39,895 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 334 transitions. [2020-09-25 09:11:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-25 09:11:39,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:39,898 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2020-09-25 09:11:39,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 09:11:39,898 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:39,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:39,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1759613834, now seen corresponding path program 1 times [2020-09-25 09:11:39,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:39,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681637403] [2020-09-25 09:11:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:39,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:39,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:40,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:40,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:44,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:44,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-09-25 09:11:44,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 09:11:44,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 09:11:44,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:44,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:44,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 09:11:44,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 09:11:44,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-09-25 09:11:44,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:45,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:45,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:45,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:45,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:45,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:45,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:45,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:45,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:45,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:45,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:45,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:45,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:45,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 09:11:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:45,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:45,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:45,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:45,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:45,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 09:11:45,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:45,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:45,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:45,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 09:11:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:45,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:45,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:45,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:45,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:45,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 09:11:45,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:45,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:45,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:45,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:45,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:45,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:45,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-25 09:11:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:45,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:45,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:45,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:45,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:45,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:11:45,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:45,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:45,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:45,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 09:11:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:45,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:45,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:45,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:45,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:45,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:45,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:45,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:45,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:45,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:45,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:45,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:45,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 09:11:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:45,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:45,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:45,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:45,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:45,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:45,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:45,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:45,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:45,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:45,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:45,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:45,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-25 09:11:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:45,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:45,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:45,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:45,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:45,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:45,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:45,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:45,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:45,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:45,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:45,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:45,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-25 09:11:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:45,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:45,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:45,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:45,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:45,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 09:11:45,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:45,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:45,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:45,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:45,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:45,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-25 09:11:45,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681637403] [2020-09-25 09:11:45,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:45,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 09:11:45,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193990564] [2020-09-25 09:11:45,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 09:11:45,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:45,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 09:11:45,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-09-25 09:11:45,269 INFO L87 Difference]: Start difference. First operand 281 states and 334 transitions. Second operand 12 states. [2020-09-25 09:11:45,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:45,828 INFO L93 Difference]: Finished difference Result 301 states and 355 transitions. [2020-09-25 09:11:45,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 09:11:45,829 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-09-25 09:11:45,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:45,831 INFO L225 Difference]: With dead ends: 301 [2020-09-25 09:11:45,831 INFO L226 Difference]: Without dead ends: 299 [2020-09-25 09:11:45,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2020-09-25 09:11:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-25 09:11:45,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 291. [2020-09-25 09:11:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-09-25 09:11:45,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 345 transitions. [2020-09-25 09:11:45,848 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 345 transitions. Word has length 81 [2020-09-25 09:11:45,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:45,849 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 345 transitions. [2020-09-25 09:11:45,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 09:11:45,849 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 345 transitions. [2020-09-25 09:11:45,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-25 09:11:45,850 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:45,851 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2020-09-25 09:11:45,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 09:11:45,851 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:45,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:45,852 INFO L82 PathProgramCache]: Analyzing trace with hash -343631243, now seen corresponding path program 1 times [2020-09-25 09:11:45,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:45,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654753861] [2020-09-25 09:11:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:45,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:45,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:46,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:46,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:50,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:50,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-09-25 09:11:50,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 09:11:50,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 09:11:50,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:50,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:50,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:11:50,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 09:11:50,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-25 09:11:50,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:50,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:11:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:50,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:50,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:50,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:11:50,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:50,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:11:50,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:50,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:50,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:11:50,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:50,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:11:50,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:50,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 09:11:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:50,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:50,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:50,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:50,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:50,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:50,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:50,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:50,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:50,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 09:11:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:50,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:50,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:50,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:50,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:50,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:11:50,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:50,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:50,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:50,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:50,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:50,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:50,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-25 09:11:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:50,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:50,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:50,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:50,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:50,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 09:11:50,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:50,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:50,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:50,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:50,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:50,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:50,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 09:11:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:50,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:51,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:51,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:51,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:11:51,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:51,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:51,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:51,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:51,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:51,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:51,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 09:11:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:51,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:51,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:51,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:51,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 09:11:51,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:51,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:51,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:51,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:51,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:51,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:11:51,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-25 09:11:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:51,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:11:51,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 09:11:51,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:11:51,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 09:11:51,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:11:51,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:11:51,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:11:51,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:11:51,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 09:11:51,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:11:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-09-25 09:11:51,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654753861] [2020-09-25 09:11:51,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:11:51,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:11:51,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442891474] [2020-09-25 09:11:51,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:11:51,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:11:51,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:11:51,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:11:51,034 INFO L87 Difference]: Start difference. First operand 291 states and 345 transitions. Second operand 11 states. [2020-09-25 09:11:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:11:51,349 INFO L93 Difference]: Finished difference Result 332 states and 392 transitions. [2020-09-25 09:11:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 09:11:51,350 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-09-25 09:11:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:11:51,352 INFO L225 Difference]: With dead ends: 332 [2020-09-25 09:11:51,352 INFO L226 Difference]: Without dead ends: 330 [2020-09-25 09:11:51,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-25 09:11:51,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-09-25 09:11:51,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 320. [2020-09-25 09:11:51,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-09-25 09:11:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 379 transitions. [2020-09-25 09:11:51,368 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 379 transitions. Word has length 83 [2020-09-25 09:11:51,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:11:51,368 INFO L479 AbstractCegarLoop]: Abstraction has 320 states and 379 transitions. [2020-09-25 09:11:51,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:11:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 379 transitions. [2020-09-25 09:11:51,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-25 09:11:51,370 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:11:51,370 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:11:51,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 09:11:51,371 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:11:51,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:11:51,371 INFO L82 PathProgramCache]: Analyzing trace with hash -857748777, now seen corresponding path program 3 times [2020-09-25 09:11:51,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:11:51,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54787453] [2020-09-25 09:11:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:11:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:11:51,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:11:51,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking...