/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 01:08:33,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:08:33,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:08:33,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:08:33,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:08:33,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:08:33,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:08:33,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:08:33,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:08:33,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:08:33,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:08:33,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:08:33,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:08:33,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:08:33,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:08:33,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:08:33,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:08:33,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:08:33,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:08:33,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:08:33,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:08:33,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:08:33,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:08:33,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:08:33,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:08:33,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:08:33,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:08:33,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:08:33,146 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:08:33,147 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-25 01:08:33,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:08:33,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:08:33,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:08:33,156 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 01:08:33,201 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:08:33,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:08:33,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:08:33,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:08:33,204 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:08:33,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:08:33,205 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:08:33,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:08:33,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:08:33,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:08:33,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:08:33,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:08:33,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:08:33,207 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:08:33,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:08:33,207 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:08:33,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:08:33,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:08:33,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:08:33,208 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:08:33,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:08:33,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:08:33,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:08:33,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:08:33,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:08:33,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:08:33,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:08:33,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:08:33,210 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:08:33,210 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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;log-additional-information=true; [2020-09-25 01:08:33,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:08:33,767 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:08:33,772 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:08:33,774 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:08:33,775 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:08:33,776 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-25 01:08:33,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e96ea6048/c333584cfb664bfc871fd63e58ff37a3/FLAG4d03faf49 [2020-09-25 01:08:34,464 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:08:34,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-25 01:08:34,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e96ea6048/c333584cfb664bfc871fd63e58ff37a3/FLAG4d03faf49 [2020-09-25 01:08:34,796 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e96ea6048/c333584cfb664bfc871fd63e58ff37a3 [2020-09-25 01:08:34,812 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:08:34,818 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:08:34,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:08:34,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:08:34,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:08:34,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:08:34" (1/1) ... [2020-09-25 01:08:34,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:34, skipping insertion in model container [2020-09-25 01:08:34,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:08:34" (1/1) ... [2020-09-25 01:08:34,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:08:34,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:08:35,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:08:35,147 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:08:35,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:08:35,186 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:08:35,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35 WrapperNode [2020-09-25 01:08:35,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:08:35,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:08:35,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:08:35,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:08:35,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (1/1) ... [2020-09-25 01:08:35,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (1/1) ... [2020-09-25 01:08:35,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (1/1) ... [2020-09-25 01:08:35,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (1/1) ... [2020-09-25 01:08:35,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (1/1) ... [2020-09-25 01:08:35,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (1/1) ... [2020-09-25 01:08:35,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (1/1) ... [2020-09-25 01:08:35,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:08:35,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:08:35,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:08:35,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:08:35,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (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 01:08:35,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:08:35,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:08:35,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 01:08:35,404 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-25 01:08:35,404 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:08:35,404 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 01:08:35,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:08:35,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 01:08:35,405 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 01:08:35,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 01:08:35,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 01:08:35,405 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:08:35,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 01:08:35,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 01:08:35,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 01:08:35,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:08:35,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:08:35,760 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:08:35,760 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 01:08:35,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:08:35 BoogieIcfgContainer [2020-09-25 01:08:35,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:08:35,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:08:35,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:08:35,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:08:35,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:08:34" (1/3) ... [2020-09-25 01:08:35,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@553ef119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:08:35, skipping insertion in model container [2020-09-25 01:08:35,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:35" (2/3) ... [2020-09-25 01:08:35,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@553ef119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:08:35, skipping insertion in model container [2020-09-25 01:08:35,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:08:35" (3/3) ... [2020-09-25 01:08:35,775 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-09-25 01:08:35,785 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:08:35,795 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 01:08:35,814 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 01:08:35,840 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:08:35,840 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:08:35,840 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:08:35,840 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:08:35,840 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:08:35,841 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:08:35,841 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:08:35,841 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:08:35,863 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-25 01:08:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 01:08:35,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:35,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:35,872 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:35,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:35,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1392671971, now seen corresponding path program 1 times [2020-09-25 01:08:35,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:35,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998834871] [2020-09-25 01:08:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:36,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:36,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:36,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:36,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 01:08:36,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:08:36,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-09-25 01:08:36,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:36,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:08:36,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 01:08:36,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 01:08:36,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 01:08:36,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:36,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:36,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:36,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:36,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:36,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 01:08:36,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:36,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:36,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:36,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:36,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:36,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 01:08:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:36,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:36,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:36,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:36,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 01:08:36,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:08:36,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 01:08:36,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:36,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:36,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 01:08:36,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:36,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:36,598 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 01:08:36,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998834871] [2020-09-25 01:08:36,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:08:36,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 01:08:36,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426050497] [2020-09-25 01:08:36,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 01:08:36,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:36,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 01:08:36,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:08:36,637 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 5 states. [2020-09-25 01:08:36,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:36,909 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2020-09-25 01:08:36,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 01:08:36,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-25 01:08:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:36,927 INFO L225 Difference]: With dead ends: 109 [2020-09-25 01:08:36,928 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 01:08:36,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 01:08:36,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 01:08:36,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-25 01:08:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 01:08:37,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-25 01:08:37,003 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-25 01:08:37,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:37,003 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-25 01:08:37,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 01:08:37,004 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-25 01:08:37,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 01:08:37,006 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:37,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:37,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:08:37,007 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:37,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:37,008 INFO L82 PathProgramCache]: Analyzing trace with hash 215899159, now seen corresponding path program 1 times [2020-09-25 01:08:37,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:37,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059151489] [2020-09-25 01:08:37,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:37,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:37,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:37,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:38,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:38,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 01:08:38,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:08:38,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1682 [2020-09-25 01:08:38,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:38,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:08:38,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 01:08:38,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 01:08:38,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:38,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:38,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:38,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:38,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:38,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:38,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 01:08:38,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:38,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:38,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:38,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:38,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:38,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 01:08:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:38,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:38,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:38,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:38,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 01:08:38,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:08:38,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 01:08:38,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:38,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:08:38,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 01:08:38,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 01:08:38,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:38,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059151489] [2020-09-25 01:08:38,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:38,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 01:08:38,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623194873] [2020-09-25 01:08:38,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 01:08:38,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:38,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 01:08:38,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-25 01:08:38,908 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 10 states. [2020-09-25 01:08:39,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:39,333 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2020-09-25 01:08:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 01:08:39,334 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-09-25 01:08:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:39,336 INFO L225 Difference]: With dead ends: 106 [2020-09-25 01:08:39,336 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 01:08:39,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-25 01:08:39,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 01:08:39,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2020-09-25 01:08:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 01:08:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-09-25 01:08:39,349 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 36 [2020-09-25 01:08:39,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:39,349 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-09-25 01:08:39,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 01:08:39,350 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-09-25 01:08:39,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 01:08:39,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:39,352 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 01:08:39,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:08:39,352 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:39,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:39,353 INFO L82 PathProgramCache]: Analyzing trace with hash 589608213, now seen corresponding path program 1 times [2020-09-25 01:08:39,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:39,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139987702] [2020-09-25 01:08:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:39,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:39,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:39,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:41,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:43,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:44,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:44,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 01:08:44,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 01:08:44,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 01:08:44,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:44,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 01:08:44,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-25 01:08:44,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 01:08:44,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:44,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:44,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:44,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:44,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:44,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:44,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 01:08:44,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:44,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:44,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:44,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:44,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:44,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 01:08:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:44,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:44,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:44,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:44,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 01:08:44,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:08:44,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-25 01:08:44,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:44,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 01:08:44,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 01:08:44,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 01:08:44,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:44,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139987702] [2020-09-25 01:08:44,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:44,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 01:08:44,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384454674] [2020-09-25 01:08:44,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 01:08:44,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:44,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 01:08:44,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-25 01:08:44,672 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 14 states. [2020-09-25 01:08:45,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:45,200 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2020-09-25 01:08:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 01:08:45,201 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-09-25 01:08:45,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:45,203 INFO L225 Difference]: With dead ends: 130 [2020-09-25 01:08:45,203 INFO L226 Difference]: Without dead ends: 93 [2020-09-25 01:08:45,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-09-25 01:08:45,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-25 01:08:45,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2020-09-25 01:08:45,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-25 01:08:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-09-25 01:08:45,215 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 49 [2020-09-25 01:08:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:45,215 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-09-25 01:08:45,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 01:08:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-09-25 01:08:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 01:08:45,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:45,218 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:45,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 01:08:45,218 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:45,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:45,219 INFO L82 PathProgramCache]: Analyzing trace with hash -138713633, now seen corresponding path program 2 times [2020-09-25 01:08:45,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:45,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399958382] [2020-09-25 01:08:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:45,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:45,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:45,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:45,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:45,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:50,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:50,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 01:08:50,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 01:08:50,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-09-25 01:08:50,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:50,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 01:08:50,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 01:08:50,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 01:08:50,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 01:08:50,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:50,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:50,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:50,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:50,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:50,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 01:08:50,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:50,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:50,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:50,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:50,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:50,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 01:08:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:50,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:50,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:50,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:50,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 01:08:50,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:08:50,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-09-25 01:08:50,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 01:08:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 01:08:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 01:08:50,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:50,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399958382] [2020-09-25 01:08:50,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:50,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 01:08:50,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572088916] [2020-09-25 01:08:50,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 01:08:50,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:50,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 01:08:50,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-09-25 01:08:50,762 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 18 states. [2020-09-25 01:08:51,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:51,433 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2020-09-25 01:08:51,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-25 01:08:51,433 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-09-25 01:08:51,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:51,435 INFO L225 Difference]: With dead ends: 154 [2020-09-25 01:08:51,435 INFO L226 Difference]: Without dead ends: 108 [2020-09-25 01:08:51,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 01:08:51,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-25 01:08:51,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 90. [2020-09-25 01:08:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-25 01:08:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-09-25 01:08:51,461 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 62 [2020-09-25 01:08:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:51,462 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-09-25 01:08:51,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 01:08:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-09-25 01:08:51,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 01:08:51,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:51,467 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2020-09-25 01:08:51,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 01:08:51,468 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:51,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:51,469 INFO L82 PathProgramCache]: Analyzing trace with hash -330918067, now seen corresponding path program 3 times [2020-09-25 01:08:51,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:51,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86694446] [2020-09-25 01:08:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:51,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:51,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:51,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:51,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:52,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:52,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:52,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:52,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:52,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:53,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:56,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:56,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-25 01:08:56,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 01:08:56,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 01:08:56,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:56,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 01:08:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 01:08:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 01:08:56,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:56,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:56,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:56,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:56,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:56,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:56,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 01:08:56,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:56,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:56,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:56,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:56,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 01:08:56,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 01:08:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:56,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:56,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:56,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:56,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 01:08:56,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:08:56,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-09-25 01:08:56,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:56,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 01:08:56,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 01:08:56,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 01:08:56,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:57,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86694446] [2020-09-25 01:08:57,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:57,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-25 01:08:57,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458159455] [2020-09-25 01:08:57,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-25 01:08:57,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:57,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-25 01:08:57,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2020-09-25 01:08:57,312 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 22 states. [2020-09-25 01:08:58,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:58,132 INFO L93 Difference]: Finished difference Result 178 states and 197 transitions. [2020-09-25 01:08:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-25 01:08:58,133 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 75 [2020-09-25 01:08:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:58,136 INFO L225 Difference]: With dead ends: 178 [2020-09-25 01:08:58,136 INFO L226 Difference]: Without dead ends: 123 [2020-09-25 01:08:58,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 01:08:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-25 01:08:58,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2020-09-25 01:08:58,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-25 01:08:58,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2020-09-25 01:08:58,155 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 75 [2020-09-25 01:08:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:58,158 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2020-09-25 01:08:58,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-25 01:08:58,159 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2020-09-25 01:08:58,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-25 01:08:58,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:58,160 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2020-09-25 01:08:58,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 01:08:58,161 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:58,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:58,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1356609447, now seen corresponding path program 4 times [2020-09-25 01:08:58,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:58,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700476656] [2020-09-25 01:08:58,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:58,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:58,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:58,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:58,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:58,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:59,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:00,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:00,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:02,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:03,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:03,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-25 01:09:03,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 01:09:03,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 01:09:03,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:03,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 01:09:03,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-25 01:09:03,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 01:09:03,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:03,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:03,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:03,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:03,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:03,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:03,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 01:09:03,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:03,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:03,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:03,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:03,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:03,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 01:09:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:03,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:03,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:03,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:03,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 01:09:03,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:03,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-09-25 01:09:03,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 01:09:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 01:09:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 01:09:03,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:04,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700476656] [2020-09-25 01:09:04,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:04,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-25 01:09:04,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218874060] [2020-09-25 01:09:04,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-25 01:09:04,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:04,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-25 01:09:04,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2020-09-25 01:09:04,183 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand 26 states. [2020-09-25 01:09:05,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:05,187 INFO L93 Difference]: Finished difference Result 202 states and 223 transitions. [2020-09-25 01:09:05,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-25 01:09:05,188 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 88 [2020-09-25 01:09:05,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:05,189 INFO L225 Difference]: With dead ends: 202 [2020-09-25 01:09:05,190 INFO L226 Difference]: Without dead ends: 138 [2020-09-25 01:09:05,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=364, Invalid=1892, Unknown=0, NotChecked=0, Total=2256 [2020-09-25 01:09:05,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-25 01:09:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 120. [2020-09-25 01:09:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-25 01:09:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2020-09-25 01:09:05,209 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 88 [2020-09-25 01:09:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:05,210 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2020-09-25 01:09:05,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-25 01:09:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2020-09-25 01:09:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-25 01:09:05,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:05,215 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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] [2020-09-25 01:09:05,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 01:09:05,216 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:05,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:05,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1436643717, now seen corresponding path program 5 times [2020-09-25 01:09:05,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:05,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13121237] [2020-09-25 01:09:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:05,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:05,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:05,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:05,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:06,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:06,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:07,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:07,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:08,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:09,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:09,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:10,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:10,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-25 01:09:10,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 01:09:10,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 01:09:10,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:10,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-25 01:09:10,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 01:09:10,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 01:09:10,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:10,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:10,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:10,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:10,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:10,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:10,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 01:09:10,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:10,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:10,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:10,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:10,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:10,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 01:09:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:10,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:10,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:10,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:11,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:11,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:11,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:12,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:12,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:12,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:13,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:13,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:13,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:13,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:14,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:14,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:14,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:14,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:14,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:15,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:15,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 01:09:15,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-09-25 01:09:15,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 01:09:15,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 01:09:15,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 01:09:15,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 01:09:15,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 46 proven. 68 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-09-25 01:09:15,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13121237] [2020-09-25 01:09:15,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:15,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 01:09:15,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32633869] [2020-09-25 01:09:15,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 01:09:15,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:15,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 01:09:15,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2020-09-25 01:09:15,840 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand 24 states. [2020-09-25 01:09:16,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:16,760 INFO L93 Difference]: Finished difference Result 203 states and 221 transitions. [2020-09-25 01:09:16,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 01:09:16,761 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 101 [2020-09-25 01:09:16,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:16,762 INFO L225 Difference]: With dead ends: 203 [2020-09-25 01:09:16,762 INFO L226 Difference]: Without dead ends: 130 [2020-09-25 01:09:16,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=339, Invalid=1553, Unknown=0, NotChecked=0, Total=1892 [2020-09-25 01:09:16,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-25 01:09:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-09-25 01:09:16,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-25 01:09:16,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2020-09-25 01:09:16,785 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 101 [2020-09-25 01:09:16,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:16,785 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2020-09-25 01:09:16,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 01:09:16,786 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2020-09-25 01:09:16,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-25 01:09:16,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:16,787 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 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 01:09:16,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 01:09:16,788 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:16,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:16,791 INFO L82 PathProgramCache]: Analyzing trace with hash 777918849, now seen corresponding path program 6 times [2020-09-25 01:09:16,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:16,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542415796] [2020-09-25 01:09:16,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:16,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:16,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:17,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:17,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:18,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:18,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking...