/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 interpolation-heuristic=FIRST --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-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:10:33,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:10:33,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:10:33,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:10:33,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:10:33,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:10:33,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:10:33,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:10:33,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:10:33,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:10:33,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:10:33,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:10:33,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:10:33,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:10:33,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:10:33,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:10:33,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:10:33,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:10:33,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:10:33,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:10:33,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:10:33,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:10:33,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:10:33,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:10:33,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:10:33,814 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:10:33,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:10:33,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:10:33,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:10:33,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:10:33,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:10:33,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:10:33,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:10:33,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:10:33,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:10:33,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:10:33,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:10:33,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:10:33,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:10:33,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:10:33,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:10:33,831 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 [2020-09-24 16:10:33,880 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:10:33,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:10:33,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:10:33,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:10:33,883 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:10:33,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:10:33,884 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:10:33,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:10:33,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:10:33,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:10:33,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:10:33,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:10:33,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:10:33,886 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:10:33,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:10:33,887 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:10:33,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:10:33,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:10:33,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:10:33,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:10:33,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:10:33,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:10:33,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:10:33,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:10:33,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:10:33,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:10:33,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:10:33,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:10:33,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:10:33,890 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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-24 16:10:34,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:10:34,399 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:10:34,403 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:10:34,405 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:10:34,406 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:10:34,407 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-24 16:10:34,493 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47f68d0fc/256a35514382476eb02c24201d657ec0/FLAGa63ca327c [2020-09-24 16:10:34,995 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:10:34,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-24 16:10:35,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47f68d0fc/256a35514382476eb02c24201d657ec0/FLAGa63ca327c [2020-09-24 16:10:35,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47f68d0fc/256a35514382476eb02c24201d657ec0 [2020-09-24 16:10:35,370 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:10:35,376 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:10:35,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:10:35,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:10:35,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:10:35,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:35" (1/1) ... [2020-09-24 16:10:35,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc17a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35, skipping insertion in model container [2020-09-24 16:10:35,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:35" (1/1) ... [2020-09-24 16:10:35,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:10:35,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:10:35,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:10:35,729 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:10:35,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:10:35,776 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:10:35,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35 WrapperNode [2020-09-24 16:10:35,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:10:35,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:10:35,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:10:35,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:10:35,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (1/1) ... [2020-09-24 16:10:35,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (1/1) ... [2020-09-24 16:10:35,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (1/1) ... [2020-09-24 16:10:35,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (1/1) ... [2020-09-24 16:10:35,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (1/1) ... [2020-09-24 16:10:35,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (1/1) ... [2020-09-24 16:10:35,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (1/1) ... [2020-09-24 16:10:35,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:10:35,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:10:35,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:10:35,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:10:35,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (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 [2020-09-24 16:10:35,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:10:35,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:10:35,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 16:10:35,995 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:10:35,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:10:35,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 16:10:35,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 16:10:35,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:10:35,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 16:10:35,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 16:10:35,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 16:10:35,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 16:10:35,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:10:35,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:10:36,310 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:10:36,311 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 16:10:36,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:36 BoogieIcfgContainer [2020-09-24 16:10:36,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:10:36,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:10:36,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:10:36,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:10:36,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:10:35" (1/3) ... [2020-09-24 16:10:36,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e0cd7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:36, skipping insertion in model container [2020-09-24 16:10:36,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:35" (2/3) ... [2020-09-24 16:10:36,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e0cd7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:36, skipping insertion in model container [2020-09-24 16:10:36,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:36" (3/3) ... [2020-09-24 16:10:36,328 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-09-24 16:10:36,341 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:10:36,355 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:10:36,379 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:10:36,417 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:10:36,418 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:10:36,418 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:10:36,418 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:10:36,418 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:10:36,418 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:10:36,419 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:10:36,419 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:10:36,444 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-09-24 16:10:36,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 16:10:36,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:36,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:36,453 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:36,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:36,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2145994368, now seen corresponding path program 1 times [2020-09-24 16:10:36,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:36,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572307603] [2020-09-24 16:10:36,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:36,616 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:36,617 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:36,617 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:36,617 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:36,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 16:10:36,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:36,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 16:10:36,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:36,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:36,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 16:10:36,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:36,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:36,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:36,710 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:36,711 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:36,711 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:36,711 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:36,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:36,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:36,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:36,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:36,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:36,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:36,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:36,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572307603] [2020-09-24 16:10:36,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:36,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 16:10:36,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509460489] [2020-09-24 16:10:36,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 16:10:36,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:36,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 16:10:36,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 16:10:36,760 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-09-24 16:10:36,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:36,905 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-09-24 16:10:36,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 16:10:36,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-09-24 16:10:36,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:36,919 INFO L225 Difference]: With dead ends: 61 [2020-09-24 16:10:36,919 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 16:10:36,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 16:10:36,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 16:10:36,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-24 16:10:36,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-24 16:10:36,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-09-24 16:10:36,973 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2020-09-24 16:10:36,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:36,973 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-09-24 16:10:36,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 16:10:36,973 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-09-24 16:10:36,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-24 16:10:36,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:36,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:36,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:10:36,976 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:36,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:36,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2141881988, now seen corresponding path program 1 times [2020-09-24 16:10:36,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:36,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142171616] [2020-09-24 16:10:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,015 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,015 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,015 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,016 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 16:10:37,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 16:10:37,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:10:37,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:37,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 16:10:37,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:37,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,109 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,109 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,110 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,110 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:37,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 16:10:37,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:37,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:37,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:37,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:37,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142171616] [2020-09-24 16:10:37,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:37,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:10:37,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410615073] [2020-09-24 16:10:37,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:10:37,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:37,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:10:37,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:10:37,127 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-09-24 16:10:37,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:37,230 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-09-24 16:10:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:10:37,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-09-24 16:10:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:37,234 INFO L225 Difference]: With dead ends: 59 [2020-09-24 16:10:37,235 INFO L226 Difference]: Without dead ends: 45 [2020-09-24 16:10:37,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:10:37,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-24 16:10:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2020-09-24 16:10:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 16:10:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-24 16:10:37,247 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 19 [2020-09-24 16:10:37,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:37,248 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-24 16:10:37,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:10:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-24 16:10:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 16:10:37,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:37,249 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] [2020-09-24 16:10:37,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 16:10:37,250 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:37,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:37,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1000622251, now seen corresponding path program 1 times [2020-09-24 16:10:37,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:37,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622724693] [2020-09-24 16:10:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,290 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,291 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,291 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,291 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 16:10:37,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 16:10:37,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:10:37,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:37,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 16:10:37,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:37,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,363 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,364 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,364 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,364 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:37,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:37,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:37,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:37,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:37,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:37,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622724693] [2020-09-24 16:10:37,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:37,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 16:10:37,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837396267] [2020-09-24 16:10:37,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 16:10:37,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:37,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 16:10:37,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:10:37,380 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 6 states. [2020-09-24 16:10:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:37,519 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-09-24 16:10:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 16:10:37,520 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-09-24 16:10:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:37,521 INFO L225 Difference]: With dead ends: 70 [2020-09-24 16:10:37,522 INFO L226 Difference]: Without dead ends: 52 [2020-09-24 16:10:37,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:10:37,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-24 16:10:37,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-09-24 16:10:37,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-24 16:10:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-09-24 16:10:37,547 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2020-09-24 16:10:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:37,548 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-09-24 16:10:37,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 16:10:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-09-24 16:10:37,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 16:10:37,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:37,552 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] [2020-09-24 16:10:37,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 16:10:37,553 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:37,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:37,554 INFO L82 PathProgramCache]: Analyzing trace with hash 231352676, now seen corresponding path program 2 times [2020-09-24 16:10:37,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:37,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453441464] [2020-09-24 16:10:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,625 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,625 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,625 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,625 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 16:10:37,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 16:10:37,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:10:37,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:37,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 16:10:37,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:37,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,728 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,728 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,728 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,729 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:37,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:37,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:37,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:37,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:37,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:37,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453441464] [2020-09-24 16:10:37,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:37,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 16:10:37,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688003256] [2020-09-24 16:10:37,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 16:10:37,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:37,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 16:10:37,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:10:37,741 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 8 states. [2020-09-24 16:10:37,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:37,919 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-09-24 16:10:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 16:10:37,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-24 16:10:37,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:37,921 INFO L225 Difference]: With dead ends: 77 [2020-09-24 16:10:37,921 INFO L226 Difference]: Without dead ends: 59 [2020-09-24 16:10:37,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 16:10:37,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-24 16:10:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2020-09-24 16:10:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 16:10:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-09-24 16:10:37,932 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 33 [2020-09-24 16:10:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:37,932 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-09-24 16:10:37,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 16:10:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-09-24 16:10:37,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 16:10:37,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:37,934 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-24 16:10:37,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 16:10:37,934 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:37,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:37,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1221138549, now seen corresponding path program 3 times [2020-09-24 16:10:37,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:37,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474341510] [2020-09-24 16:10:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:37,964 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:37,964 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:37,964 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:37,965 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:37,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 16:10:37,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:37,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 16:10:37,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:10:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-24 16:10:37,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 16:10:37,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:38,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:38,036 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:38,036 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:38,036 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:38,037 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:38,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:38,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:38,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:38,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:38,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:38,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:38,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:38,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-24 16:10:38,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474341510] [2020-09-24 16:10:38,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:38,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 16:10:38,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458869976] [2020-09-24 16:10:38,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 16:10:38,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:38,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 16:10:38,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:10:38,047 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 6 states. [2020-09-24 16:10:38,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:38,188 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-09-24 16:10:38,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 16:10:38,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-09-24 16:10:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:38,190 INFO L225 Difference]: With dead ends: 58 [2020-09-24 16:10:38,190 INFO L226 Difference]: Without dead ends: 52 [2020-09-24 16:10:38,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:10:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-24 16:10:38,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-09-24 16:10:38,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 16:10:38,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-09-24 16:10:38,199 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 40 [2020-09-24 16:10:38,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:38,200 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-09-24 16:10:38,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 16:10:38,200 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-09-24 16:10:38,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 16:10:38,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:38,201 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:38,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 16:10:38,202 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:38,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:38,203 INFO L82 PathProgramCache]: Analyzing trace with hash -842063729, now seen corresponding path program 1 times [2020-09-24 16:10:38,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:38,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187412295] [2020-09-24 16:10:38,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:38,250 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:38,250 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:38,250 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:38,250 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:38,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-24 16:10:38,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:38,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 16:10:38,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:38,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:10:38,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-24 16:10:38,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 16:10:38,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:38,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:38,380 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:38,381 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:38,381 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:38,381 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:38,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:38,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:38,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:38,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:38,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:38,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:38,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:38,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 16:10:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-24 16:10:38,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187412295] [2020-09-24 16:10:38,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:38,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 16:10:38,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394169717] [2020-09-24 16:10:38,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 16:10:38,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:38,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 16:10:38,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:10:38,402 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 8 states. [2020-09-24 16:10:38,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:38,609 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-09-24 16:10:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 16:10:38,610 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-09-24 16:10:38,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:38,614 INFO L225 Difference]: With dead ends: 63 [2020-09-24 16:10:38,614 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 16:10:38,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-24 16:10:38,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 16:10:38,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-24 16:10:38,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 16:10:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-09-24 16:10:38,632 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 47 [2020-09-24 16:10:38,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:38,636 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-09-24 16:10:38,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 16:10:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-09-24 16:10:38,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-24 16:10:38,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:38,642 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-24 16:10:38,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 16:10:38,642 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:38,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:38,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1280223029, now seen corresponding path program 2 times [2020-09-24 16:10:38,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:38,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830221442] [2020-09-24 16:10:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:38,727 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:38,727 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:38,727 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:38,730 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:38,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-24 16:10:38,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:38,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 16:10:38,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:38,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:10:38,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:38,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 16:10:38,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:38,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:38,858 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:38,859 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:38,859 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:38,859 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:38,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:38,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:38,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:38,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:38,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:38,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:38,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:38,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:10:38,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830221442] [2020-09-24 16:10:38,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:38,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 16:10:38,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668342120] [2020-09-24 16:10:38,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 16:10:38,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:38,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 16:10:38,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 16:10:38,889 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 10 states. [2020-09-24 16:10:39,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:39,105 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2020-09-24 16:10:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 16:10:39,106 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-09-24 16:10:39,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:39,107 INFO L225 Difference]: With dead ends: 94 [2020-09-24 16:10:39,107 INFO L226 Difference]: Without dead ends: 69 [2020-09-24 16:10:39,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 16:10:39,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-24 16:10:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-09-24 16:10:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 16:10:39,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-24 16:10:39,123 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 54 [2020-09-24 16:10:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:39,124 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-24 16:10:39,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 16:10:39,124 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-24 16:10:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 16:10:39,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:39,127 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2020-09-24 16:10:39,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 16:10:39,130 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:39,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:39,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1143766212, now seen corresponding path program 3 times [2020-09-24 16:10:39,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:39,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327060850] [2020-09-24 16:10:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:39,214 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:39,215 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:39,215 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:39,215 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:39,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-24 16:10:39,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:39,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-24 16:10:39,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:39,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:10:39,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:39,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 16:10:39,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:39,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:39,334 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:39,334 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:39,334 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:39,334 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:39,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:39,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:39,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:39,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:39,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:39,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:39,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:39,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:10:39,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327060850] [2020-09-24 16:10:39,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:39,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 16:10:39,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247335778] [2020-09-24 16:10:39,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 16:10:39,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:39,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 16:10:39,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 16:10:39,347 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 12 states. [2020-09-24 16:10:39,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:39,629 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2020-09-24 16:10:39,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 16:10:39,629 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-09-24 16:10:39,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:39,631 INFO L225 Difference]: With dead ends: 101 [2020-09-24 16:10:39,634 INFO L226 Difference]: Without dead ends: 76 [2020-09-24 16:10:39,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 16:10:39,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-24 16:10:39,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2020-09-24 16:10:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-24 16:10:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-09-24 16:10:39,648 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 61 [2020-09-24 16:10:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:39,648 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-09-24 16:10:39,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 16:10:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-09-24 16:10:39,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-24 16:10:39,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:39,650 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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] [2020-09-24 16:10:39,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 16:10:39,651 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:39,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:39,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1966270379, now seen corresponding path program 4 times [2020-09-24 16:10:39,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:39,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255856474] [2020-09-24 16:10:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:39,703 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:39,704 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:39,704 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:39,704 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:39,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-24 16:10:39,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:39,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-24 16:10:39,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:39,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 16:10:39,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:39,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 16:10:39,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:39,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:39,833 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:39,834 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:39,834 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:39,834 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:39,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:39,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:39,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:39,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:39,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:39,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:39,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:39,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:10:39,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255856474] [2020-09-24 16:10:39,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:39,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 16:10:39,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339445990] [2020-09-24 16:10:39,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 16:10:39,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:39,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 16:10:39,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-24 16:10:39,846 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 14 states. [2020-09-24 16:10:40,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:40,142 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-09-24 16:10:40,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 16:10:40,144 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-09-24 16:10:40,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:40,146 INFO L225 Difference]: With dead ends: 108 [2020-09-24 16:10:40,146 INFO L226 Difference]: Without dead ends: 83 [2020-09-24 16:10:40,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-24 16:10:40,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-24 16:10:40,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-09-24 16:10:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-24 16:10:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-09-24 16:10:40,154 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2020-09-24 16:10:40,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:40,155 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-09-24 16:10:40,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 16:10:40,155 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-09-24 16:10:40,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-24 16:10:40,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:40,156 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 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] [2020-09-24 16:10:40,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 16:10:40,157 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:40,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:40,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1126004828, now seen corresponding path program 5 times [2020-09-24 16:10:40,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:40,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922026509] [2020-09-24 16:10:40,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:40,213 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:40,214 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:40,214 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:40,214 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:40,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-24 16:10:40,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:40,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-24 16:10:40,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:40,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 16:10:40,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:40,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 16:10:40,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:40,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:40,389 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:40,389 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:40,389 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:40,390 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:40,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:40,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:40,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:40,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:40,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:40,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:40,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:40,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:10:40,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922026509] [2020-09-24 16:10:40,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:40,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 16:10:40,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583019964] [2020-09-24 16:10:40,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 16:10:40,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:40,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 16:10:40,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 16:10:40,402 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 16 states. [2020-09-24 16:10:40,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:40,816 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2020-09-24 16:10:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 16:10:40,817 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-09-24 16:10:40,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:40,818 INFO L225 Difference]: With dead ends: 115 [2020-09-24 16:10:40,818 INFO L226 Difference]: Without dead ends: 90 [2020-09-24 16:10:40,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-24 16:10:40,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-24 16:10:40,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-09-24 16:10:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-24 16:10:40,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-09-24 16:10:40,827 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 75 [2020-09-24 16:10:40,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:40,828 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-09-24 16:10:40,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 16:10:40,828 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-09-24 16:10:40,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-24 16:10:40,829 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:40,830 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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] [2020-09-24 16:10:40,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 16:10:40,830 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:40,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:40,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1440804491, now seen corresponding path program 6 times [2020-09-24 16:10:40,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:40,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499538064] [2020-09-24 16:10:40,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:40,927 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:40,927 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:40,927 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:40,927 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:40,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-24 16:10:40,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:40,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-24 16:10:40,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:40,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 16:10:40,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:40,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 16:10:40,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:41,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:41,141 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:41,141 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:41,142 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:41,142 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:41,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:41,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:41,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:41,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:41,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:41,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:10:41,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499538064] [2020-09-24 16:10:41,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:41,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 16:10:41,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131478351] [2020-09-24 16:10:41,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 16:10:41,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:41,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 16:10:41,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-24 16:10:41,159 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 18 states. [2020-09-24 16:10:41,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:41,667 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-09-24 16:10:41,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 16:10:41,667 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-09-24 16:10:41,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:41,669 INFO L225 Difference]: With dead ends: 122 [2020-09-24 16:10:41,669 INFO L226 Difference]: Without dead ends: 97 [2020-09-24 16:10:41,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-24 16:10:41,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-24 16:10:41,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2020-09-24 16:10:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-24 16:10:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-09-24 16:10:41,677 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 82 [2020-09-24 16:10:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:41,677 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-09-24 16:10:41,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 16:10:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-09-24 16:10:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 16:10:41,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:41,679 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 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] [2020-09-24 16:10:41,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 16:10:41,679 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:41,680 INFO L82 PathProgramCache]: Analyzing trace with hash -247723388, now seen corresponding path program 7 times [2020-09-24 16:10:41,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:41,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314028711] [2020-09-24 16:10:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:41,757 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:41,757 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:41,758 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:41,758 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:41,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-24 16:10:41,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:41,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-24 16:10:41,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:41,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 16:10:41,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:41,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-24 16:10:41,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:41,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:41,993 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:41,993 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:41,993 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:41,994 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:41,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:41,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:41,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:41,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:41,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:41,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:41,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:41,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:10:42,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314028711] [2020-09-24 16:10:42,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:42,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 16:10:42,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64048526] [2020-09-24 16:10:42,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 16:10:42,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:42,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 16:10:42,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-24 16:10:42,019 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 20 states. [2020-09-24 16:10:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:42,437 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2020-09-24 16:10:42,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 16:10:42,438 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-09-24 16:10:42,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:42,439 INFO L225 Difference]: With dead ends: 129 [2020-09-24 16:10:42,439 INFO L226 Difference]: Without dead ends: 104 [2020-09-24 16:10:42,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 16:10:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-24 16:10:42,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2020-09-24 16:10:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-24 16:10:42,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-09-24 16:10:42,453 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 89 [2020-09-24 16:10:42,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:42,453 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-09-24 16:10:42,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 16:10:42,453 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-09-24 16:10:42,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 16:10:42,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:42,461 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 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] [2020-09-24 16:10:42,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 16:10:42,462 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:42,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:42,462 INFO L82 PathProgramCache]: Analyzing trace with hash -847867243, now seen corresponding path program 8 times [2020-09-24 16:10:42,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:42,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437832103] [2020-09-24 16:10:42,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:42,549 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:42,549 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:42,549 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:42,549 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:42,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-24 16:10:42,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:42,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-24 16:10:42,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:42,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 16:10:42,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:42,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-24 16:10:42,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:42,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:42,816 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:42,816 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:42,817 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:42,817 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:42,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:42,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:42,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:42,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:42,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:42,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:42,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:42,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:10:42,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437832103] [2020-09-24 16:10:42,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:42,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 16:10:42,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013948647] [2020-09-24 16:10:42,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 16:10:42,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:42,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 16:10:42,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-24 16:10:42,831 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 22 states. [2020-09-24 16:10:43,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:43,335 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2020-09-24 16:10:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 16:10:43,336 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 96 [2020-09-24 16:10:43,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:43,337 INFO L225 Difference]: With dead ends: 136 [2020-09-24 16:10:43,337 INFO L226 Difference]: Without dead ends: 111 [2020-09-24 16:10:43,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 16:10:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-24 16:10:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2020-09-24 16:10:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-24 16:10:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-09-24 16:10:43,348 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 96 [2020-09-24 16:10:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:43,349 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-09-24 16:10:43,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 16:10:43,349 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-09-24 16:10:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-24 16:10:43,350 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:43,350 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 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] [2020-09-24 16:10:43,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 16:10:43,351 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:43,351 INFO L82 PathProgramCache]: Analyzing trace with hash 566691172, now seen corresponding path program 9 times [2020-09-24 16:10:43,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:43,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268659667] [2020-09-24 16:10:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,500 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,500 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,501 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,501 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-24 16:10:43,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-24 16:10:43,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 16:10:43,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:43,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 16:10:43,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:43,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,794 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,794 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,795 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,795 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:43,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:43,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:43,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:10:43,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268659667] [2020-09-24 16:10:43,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:43,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 16:10:43,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817077537] [2020-09-24 16:10:43,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 16:10:43,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:43,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 16:10:43,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-24 16:10:43,815 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 24 states. [2020-09-24 16:10:44,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:44,458 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2020-09-24 16:10:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 16:10:44,459 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 103 [2020-09-24 16:10:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:44,460 INFO L225 Difference]: With dead ends: 143 [2020-09-24 16:10:44,460 INFO L226 Difference]: Without dead ends: 118 [2020-09-24 16:10:44,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 16:10:44,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-24 16:10:44,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-09-24 16:10:44,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-24 16:10:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-09-24 16:10:44,467 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 103 [2020-09-24 16:10:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:44,468 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-09-24 16:10:44,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 16:10:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-09-24 16:10:44,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-24 16:10:44,469 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:44,470 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 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] [2020-09-24 16:10:44,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 16:10:44,470 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:44,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1736074315, now seen corresponding path program 10 times [2020-09-24 16:10:44,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:44,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734161161] [2020-09-24 16:10:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,578 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,578 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,579 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,579 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-24 16:10:44,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-09-24 16:10:44,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 16:10:44,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:44,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 16:10:44,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,965 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,965 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,966 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,966 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:44,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:44,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:44,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:44,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:44,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:10:44,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734161161] [2020-09-24 16:10:44,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:44,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 16:10:44,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46768825] [2020-09-24 16:10:44,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 16:10:44,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:44,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 16:10:44,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-24 16:10:44,983 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 26 states. [2020-09-24 16:10:45,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:45,647 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2020-09-24 16:10:45,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-24 16:10:45,648 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 110 [2020-09-24 16:10:45,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:45,649 INFO L225 Difference]: With dead ends: 150 [2020-09-24 16:10:45,649 INFO L226 Difference]: Without dead ends: 125 [2020-09-24 16:10:45,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-24 16:10:45,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-24 16:10:45,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2020-09-24 16:10:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-24 16:10:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-09-24 16:10:45,656 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 110 [2020-09-24 16:10:45,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:45,656 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-09-24 16:10:45,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 16:10:45,656 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-09-24 16:10:45,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-09-24 16:10:45,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:45,658 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 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] [2020-09-24 16:10:45,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 16:10:45,658 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:45,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:45,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2123462724, now seen corresponding path program 11 times [2020-09-24 16:10:45,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:45,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605456499] [2020-09-24 16:10:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:45,772 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:45,772 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:45,772 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:45,772 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-09-24 16:10:45,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-24 16:10:45,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 16:10:45,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:45,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-24 16:10:45,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:46,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:46,197 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:46,197 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:46,197 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:46,197 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:46,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:46,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:46,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:46,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:46,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:46,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:46,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:46,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:10:46,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605456499] [2020-09-24 16:10:46,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:46,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-24 16:10:46,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099115753] [2020-09-24 16:10:46,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-24 16:10:46,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:46,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-24 16:10:46,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-24 16:10:46,213 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 28 states. [2020-09-24 16:10:47,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:47,087 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2020-09-24 16:10:47,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 16:10:47,088 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 117 [2020-09-24 16:10:47,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:47,089 INFO L225 Difference]: With dead ends: 157 [2020-09-24 16:10:47,089 INFO L226 Difference]: Without dead ends: 132 [2020-09-24 16:10:47,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-24 16:10:47,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-24 16:10:47,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2020-09-24 16:10:47,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-24 16:10:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2020-09-24 16:10:47,096 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 117 [2020-09-24 16:10:47,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:47,097 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2020-09-24 16:10:47,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-24 16:10:47,097 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2020-09-24 16:10:47,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-24 16:10:47,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:47,099 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 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] [2020-09-24 16:10:47,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 16:10:47,100 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:47,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1333669077, now seen corresponding path program 12 times [2020-09-24 16:10:47,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:47,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186817228] [2020-09-24 16:10:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:47,244 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:47,245 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:47,245 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:47,245 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:47,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-09-24 16:10:47,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:47,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-09-24 16:10:47,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:47,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 16:10:47,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:47,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-24 16:10:47,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:47,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:47,682 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:47,682 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:47,683 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:47,683 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:47,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:47,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:47,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:47,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:47,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:47,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:47,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:47,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:10:47,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186817228] [2020-09-24 16:10:47,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:47,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-24 16:10:47,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685813946] [2020-09-24 16:10:47,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-24 16:10:47,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:47,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-24 16:10:47,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-24 16:10:47,710 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 30 states. [2020-09-24 16:10:48,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:48,581 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2020-09-24 16:10:48,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-24 16:10:48,581 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 124 [2020-09-24 16:10:48,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:48,583 INFO L225 Difference]: With dead ends: 164 [2020-09-24 16:10:48,583 INFO L226 Difference]: Without dead ends: 139 [2020-09-24 16:10:48,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-24 16:10:48,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-24 16:10:48,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2020-09-24 16:10:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-24 16:10:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-09-24 16:10:48,590 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 124 [2020-09-24 16:10:48,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:48,591 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-09-24 16:10:48,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-24 16:10:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-09-24 16:10:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-24 16:10:48,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:48,593 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 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] [2020-09-24 16:10:48,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 16:10:48,593 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:48,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:48,594 INFO L82 PathProgramCache]: Analyzing trace with hash 120152868, now seen corresponding path program 13 times [2020-09-24 16:10:48,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:48,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914996564] [2020-09-24 16:10:48,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:48,744 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:48,745 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:48,745 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:48,745 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:48,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-09-24 16:10:48,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:48,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-09-24 16:10:48,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:48,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-24 16:10:48,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:48,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-24 16:10:48,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:49,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:49,320 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:49,321 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:49,321 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:49,321 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:49,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:49,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:49,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:49,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:49,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:49,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:49,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:49,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:10:49,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914996564] [2020-09-24 16:10:49,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:49,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-24 16:10:49,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109518305] [2020-09-24 16:10:49,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-24 16:10:49,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:49,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-24 16:10:49,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-24 16:10:49,355 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 32 states. [2020-09-24 16:10:50,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:50,532 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2020-09-24 16:10:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-24 16:10:50,532 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 131 [2020-09-24 16:10:50,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:50,534 INFO L225 Difference]: With dead ends: 171 [2020-09-24 16:10:50,534 INFO L226 Difference]: Without dead ends: 146 [2020-09-24 16:10:50,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-24 16:10:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-24 16:10:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 141. [2020-09-24 16:10:50,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-24 16:10:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-09-24 16:10:50,544 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 131 [2020-09-24 16:10:50,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:50,545 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-09-24 16:10:50,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-24 16:10:50,545 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-09-24 16:10:50,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-09-24 16:10:50,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:50,547 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 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] [2020-09-24 16:10:50,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 16:10:50,548 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:50,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:50,548 INFO L82 PathProgramCache]: Analyzing trace with hash -149797387, now seen corresponding path program 14 times [2020-09-24 16:10:50,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:50,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069092381] [2020-09-24 16:10:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:50,739 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:50,740 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:50,740 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:50,740 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:50,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-09-24 16:10:50,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:50,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-09-24 16:10:50,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:50,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 16:10:50,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:50,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-09-24 16:10:50,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:51,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:51,338 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:51,338 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:51,338 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:51,339 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:51,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:51,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:51,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:51,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:51,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:51,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:51,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:51,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:10:51,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069092381] [2020-09-24 16:10:51,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:51,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-24 16:10:51,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565757131] [2020-09-24 16:10:51,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-24 16:10:51,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:51,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-24 16:10:51,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 16:10:51,374 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 34 states. [2020-09-24 16:10:52,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:52,524 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2020-09-24 16:10:52,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-24 16:10:52,525 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 138 [2020-09-24 16:10:52,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:52,527 INFO L225 Difference]: With dead ends: 178 [2020-09-24 16:10:52,527 INFO L226 Difference]: Without dead ends: 153 [2020-09-24 16:10:52,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-09-24 16:10:52,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-24 16:10:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 148. [2020-09-24 16:10:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-24 16:10:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2020-09-24 16:10:52,535 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 138 [2020-09-24 16:10:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:52,535 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2020-09-24 16:10:52,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-24 16:10:52,536 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2020-09-24 16:10:52,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-24 16:10:52,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:52,537 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 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] [2020-09-24 16:10:52,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 16:10:52,538 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:52,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1788659204, now seen corresponding path program 15 times [2020-09-24 16:10:52,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:52,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528324926] [2020-09-24 16:10:52,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:52,717 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:52,717 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:52,717 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:52,717 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:52,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-09-24 16:10:52,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:52,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-09-24 16:10:52,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:52,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 16:10:52,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:52,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-09-24 16:10:52,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:53,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:53,326 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:53,326 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:53,326 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:53,326 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:53,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:53,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:53,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:53,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:53,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:53,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:53,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:53,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:10:53,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528324926] [2020-09-24 16:10:53,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:53,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-24 16:10:53,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222251574] [2020-09-24 16:10:53,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-24 16:10:53,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:53,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-24 16:10:53,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 16:10:53,358 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 36 states. [2020-09-24 16:10:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:54,560 INFO L93 Difference]: Finished difference Result 185 states and 189 transitions. [2020-09-24 16:10:54,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-24 16:10:54,561 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 145 [2020-09-24 16:10:54,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:54,562 INFO L225 Difference]: With dead ends: 185 [2020-09-24 16:10:54,562 INFO L226 Difference]: Without dead ends: 160 [2020-09-24 16:10:54,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-09-24 16:10:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-24 16:10:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2020-09-24 16:10:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-24 16:10:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2020-09-24 16:10:54,571 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 145 [2020-09-24 16:10:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:54,572 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2020-09-24 16:10:54,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-24 16:10:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2020-09-24 16:10:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-24 16:10:54,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:54,573 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 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] [2020-09-24 16:10:54,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 16:10:54,574 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:54,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:54,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1953752853, now seen corresponding path program 16 times [2020-09-24 16:10:54,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:54,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96480962] [2020-09-24 16:10:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:54,777 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:54,777 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:54,777 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:54,778 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:54,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-09-24 16:10:54,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:54,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-09-24 16:10:54,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:54,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-24 16:10:54,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:54,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-09-24 16:10:54,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:55,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:55,551 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:55,551 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:55,551 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:55,551 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:55,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:55,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:55,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-24 16:10:55,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:55,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:55,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:55,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:55,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:10:55,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96480962] [2020-09-24 16:10:55,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:55,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-24 16:10:55,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385899043] [2020-09-24 16:10:55,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-24 16:10:55,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:55,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-24 16:10:55,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 16:10:55,572 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 38 states. [2020-09-24 16:10:57,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:57,011 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2020-09-24 16:10:57,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-24 16:10:57,011 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 152 [2020-09-24 16:10:57,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:57,013 INFO L225 Difference]: With dead ends: 192 [2020-09-24 16:10:57,013 INFO L226 Difference]: Without dead ends: 167 [2020-09-24 16:10:57,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-09-24 16:10:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-24 16:10:57,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 162. [2020-09-24 16:10:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-24 16:10:57,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2020-09-24 16:10:57,021 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 152 [2020-09-24 16:10:57,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:57,022 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2020-09-24 16:10:57,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-24 16:10:57,022 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2020-09-24 16:10:57,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-24 16:10:57,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:57,023 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 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] [2020-09-24 16:10:57,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 16:10:57,024 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:57,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:57,024 INFO L82 PathProgramCache]: Analyzing trace with hash -411459356, now seen corresponding path program 17 times [2020-09-24 16:10:57,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:57,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950911755] [2020-09-24 16:10:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:57,228 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:57,228 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:57,228 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:57,228 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:57,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-09-24 16:10:57,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:57,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-09-24 16:10:57,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:57,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-24 16:10:57,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:57,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-09-24 16:10:57,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:58,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:58,091 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:58,091 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:58,091 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:58,091 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:58,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:10:58,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:58,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:58,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:58,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:58,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:58,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:58,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:10:58,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950911755] [2020-09-24 16:10:58,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:58,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-24 16:10:58,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618260900] [2020-09-24 16:10:58,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-24 16:10:58,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:58,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-24 16:10:58,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 16:10:58,120 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand 40 states. [2020-09-24 16:10:59,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:59,746 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2020-09-24 16:10:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-09-24 16:10:59,747 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 159 [2020-09-24 16:10:59,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:59,750 INFO L225 Difference]: With dead ends: 199 [2020-09-24 16:10:59,750 INFO L226 Difference]: Without dead ends: 174 [2020-09-24 16:10:59,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-09-24 16:10:59,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-24 16:10:59,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2020-09-24 16:10:59,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-24 16:10:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2020-09-24 16:10:59,759 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 159 [2020-09-24 16:10:59,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:59,759 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2020-09-24 16:10:59,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-24 16:10:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2020-09-24 16:10:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-24 16:10:59,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:59,761 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 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] [2020-09-24 16:10:59,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 16:10:59,761 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:59,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1386934219, now seen corresponding path program 18 times [2020-09-24 16:10:59,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:59,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601996266] [2020-09-24 16:10:59,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:00,020 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:00,020 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:00,020 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:00,021 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:00,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-09-24 16:11:00,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:00,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-09-24 16:11:00,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:00,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-09-24 16:11:00,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:11:00,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-09-24 16:11:00,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:00,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:00,958 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:00,959 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:00,959 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:00,959 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:00,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:11:00,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:00,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:00,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:00,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:00,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:00,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:00,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:11:00,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601996266] [2020-09-24 16:11:00,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:00,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-24 16:11:00,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57523878] [2020-09-24 16:11:00,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-24 16:11:00,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:00,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-24 16:11:00,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-09-24 16:11:00,991 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 42 states. [2020-09-24 16:11:02,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:02,593 INFO L93 Difference]: Finished difference Result 206 states and 210 transitions. [2020-09-24 16:11:02,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-24 16:11:02,594 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 166 [2020-09-24 16:11:02,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:02,595 INFO L225 Difference]: With dead ends: 206 [2020-09-24 16:11:02,595 INFO L226 Difference]: Without dead ends: 181 [2020-09-24 16:11:02,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-09-24 16:11:02,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-24 16:11:02,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 176. [2020-09-24 16:11:02,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-24 16:11:02,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2020-09-24 16:11:02,604 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 166 [2020-09-24 16:11:02,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:02,604 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2020-09-24 16:11:02,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-24 16:11:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2020-09-24 16:11:02,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-24 16:11:02,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:02,606 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 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] [2020-09-24 16:11:02,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 16:11:02,606 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:02,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:02,607 INFO L82 PathProgramCache]: Analyzing trace with hash 734917572, now seen corresponding path program 19 times [2020-09-24 16:11:02,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:02,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146797222] [2020-09-24 16:11:02,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:02,855 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:02,855 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:02,855 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:02,855 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:02,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-09-24 16:11:02,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:02,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-09-24 16:11:02,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:02,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-09-24 16:11:02,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:11:02,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-24 16:11:02,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:04,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:04,007 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:04,007 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:04,008 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:04,008 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:04,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:11:04,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:04,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:04,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:04,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:04,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:04,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:04,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 1350 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:11:04,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146797222] [2020-09-24 16:11:04,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:04,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-24 16:11:04,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945993856] [2020-09-24 16:11:04,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-24 16:11:04,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:04,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-24 16:11:04,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 16:11:04,066 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 44 states. [2020-09-24 16:11:05,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:05,647 INFO L93 Difference]: Finished difference Result 213 states and 217 transitions. [2020-09-24 16:11:05,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-09-24 16:11:05,648 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 173 [2020-09-24 16:11:05,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:05,650 INFO L225 Difference]: With dead ends: 213 [2020-09-24 16:11:05,650 INFO L226 Difference]: Without dead ends: 188 [2020-09-24 16:11:05,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-09-24 16:11:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-09-24 16:11:05,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 183. [2020-09-24 16:11:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-09-24 16:11:05,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2020-09-24 16:11:05,661 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 173 [2020-09-24 16:11:05,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:05,661 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2020-09-24 16:11:05,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-24 16:11:05,662 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2020-09-24 16:11:05,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-09-24 16:11:05,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:05,663 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 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] [2020-09-24 16:11:05,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-24 16:11:05,667 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:05,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:05,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1477983915, now seen corresponding path program 20 times [2020-09-24 16:11:05,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:05,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576334149] [2020-09-24 16:11:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:05,945 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:05,945 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:05,945 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:05,946 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:05,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-09-24 16:11:05,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:05,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-09-24 16:11:05,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:05,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-09-24 16:11:05,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:11:05,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-09-24 16:11:05,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:07,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:07,058 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:07,058 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:07,058 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:07,058 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:07,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:11:07,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:07,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-24 16:11:07,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:07,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:07,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:07,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:07,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1491 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:11:07,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576334149] [2020-09-24 16:11:07,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:07,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-09-24 16:11:07,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600486345] [2020-09-24 16:11:07,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-24 16:11:07,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:07,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-24 16:11:07,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 16:11:07,083 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 46 states. [2020-09-24 16:11:09,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:09,048 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2020-09-24 16:11:09,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-09-24 16:11:09,049 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 180 [2020-09-24 16:11:09,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:09,050 INFO L225 Difference]: With dead ends: 220 [2020-09-24 16:11:09,050 INFO L226 Difference]: Without dead ends: 195 [2020-09-24 16:11:09,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-09-24 16:11:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-24 16:11:09,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 190. [2020-09-24 16:11:09,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-09-24 16:11:09,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2020-09-24 16:11:09,059 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 180 [2020-09-24 16:11:09,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:09,059 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2020-09-24 16:11:09,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-24 16:11:09,060 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2020-09-24 16:11:09,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-09-24 16:11:09,061 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:09,061 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 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] [2020-09-24 16:11:09,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-24 16:11:09,061 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:09,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:09,062 INFO L82 PathProgramCache]: Analyzing trace with hash 891797156, now seen corresponding path program 21 times [2020-09-24 16:11:09,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:09,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531159784] [2020-09-24 16:11:09,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:09,407 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:09,408 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:09,408 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:09,408 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:09,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-09-24 16:11:09,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:09,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-09-24 16:11:09,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:09,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-09-24 16:11:09,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:11:09,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-09-24 16:11:09,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:10,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:10,645 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:10,645 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:10,646 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:10,646 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:10,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:11:10,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:10,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:10,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:10,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:10,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:10,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:10,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1639 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:11:10,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531159784] [2020-09-24 16:11:10,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:10,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-09-24 16:11:10,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227519525] [2020-09-24 16:11:10,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-24 16:11:10,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:10,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-24 16:11:10,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-09-24 16:11:10,682 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 48 states. [2020-09-24 16:11:12,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:12,998 INFO L93 Difference]: Finished difference Result 227 states and 231 transitions. [2020-09-24 16:11:12,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-09-24 16:11:12,999 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 187 [2020-09-24 16:11:12,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:13,001 INFO L225 Difference]: With dead ends: 227 [2020-09-24 16:11:13,001 INFO L226 Difference]: Without dead ends: 202 [2020-09-24 16:11:13,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-09-24 16:11:13,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-24 16:11:13,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2020-09-24 16:11:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-09-24 16:11:13,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2020-09-24 16:11:13,008 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 187 [2020-09-24 16:11:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:13,009 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2020-09-24 16:11:13,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-09-24 16:11:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2020-09-24 16:11:13,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-09-24 16:11:13,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:13,010 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 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] [2020-09-24 16:11:13,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-24 16:11:13,011 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:13,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:13,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1428293003, now seen corresponding path program 22 times [2020-09-24 16:11:13,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:13,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899293105] [2020-09-24 16:11:13,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:13,326 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:13,326 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:13,326 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:13,327 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:13,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-09-24 16:11:13,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:13,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-09-24 16:11:13,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:13,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-09-24 16:11:13,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:11:13,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-09-24 16:11:13,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:14,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:14,652 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:14,652 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:14,652 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:14,652 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:14,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:11:14,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:14,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-24 16:11:14,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:14,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:14,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:14,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:14,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 1794 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:11:14,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899293105] [2020-09-24 16:11:14,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:14,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-09-24 16:11:14,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421282098] [2020-09-24 16:11:14,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-09-24 16:11:14,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:14,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-09-24 16:11:14,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-09-24 16:11:14,682 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand 50 states. [2020-09-24 16:11:17,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:17,039 INFO L93 Difference]: Finished difference Result 234 states and 238 transitions. [2020-09-24 16:11:17,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-09-24 16:11:17,040 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 194 [2020-09-24 16:11:17,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:17,045 INFO L225 Difference]: With dead ends: 234 [2020-09-24 16:11:17,045 INFO L226 Difference]: Without dead ends: 209 [2020-09-24 16:11:17,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-09-24 16:11:17,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-24 16:11:17,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 204. [2020-09-24 16:11:17,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-24 16:11:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2020-09-24 16:11:17,058 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 194 [2020-09-24 16:11:17,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:17,058 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2020-09-24 16:11:17,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-09-24 16:11:17,059 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2020-09-24 16:11:17,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-24 16:11:17,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:17,060 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 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] [2020-09-24 16:11:17,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-24 16:11:17,060 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:17,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:17,061 INFO L82 PathProgramCache]: Analyzing trace with hash 815071620, now seen corresponding path program 23 times [2020-09-24 16:11:17,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:17,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520021866] [2020-09-24 16:11:17,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:17,429 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:17,430 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:17,430 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:17,430 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:17,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-09-24 16:11:17,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:17,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-09-24 16:11:17,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:17,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-09-24 16:11:17,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:11:17,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-09-24 16:11:17,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:18,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:18,839 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:18,839 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:18,839 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:18,839 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:18,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:11:18,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:18,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-24 16:11:18,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:18,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:18,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:18,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:18,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1967 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:11:18,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520021866] [2020-09-24 16:11:18,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:18,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-09-24 16:11:18,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941275306] [2020-09-24 16:11:18,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-09-24 16:11:18,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:18,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-09-24 16:11:18,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-09-24 16:11:18,882 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand 52 states. [2020-09-24 16:11:21,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:21,513 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2020-09-24 16:11:21,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-09-24 16:11:21,514 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 201 [2020-09-24 16:11:21,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:21,516 INFO L225 Difference]: With dead ends: 241 [2020-09-24 16:11:21,516 INFO L226 Difference]: Without dead ends: 216 [2020-09-24 16:11:21,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-09-24 16:11:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-24 16:11:21,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 211. [2020-09-24 16:11:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-09-24 16:11:21,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2020-09-24 16:11:21,524 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 201 [2020-09-24 16:11:21,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:21,524 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2020-09-24 16:11:21,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-09-24 16:11:21,525 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2020-09-24 16:11:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-09-24 16:11:21,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:21,526 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 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] [2020-09-24 16:11:21,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-24 16:11:21,526 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:21,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1567210389, now seen corresponding path program 24 times [2020-09-24 16:11:21,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:21,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647344295] [2020-09-24 16:11:21,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:21,887 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:21,887 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:21,888 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:21,888 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:21,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-09-24 16:11:21,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:21,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-09-24 16:11:21,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:21,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-09-24 16:11:21,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:11:21,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-09-24 16:11:21,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:23,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:23,487 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:23,488 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:23,488 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:23,488 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:23,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:11:23,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:23,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:23,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:23,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:23,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:23,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:23,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2136 backedges. 0 proven. 2125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 16:11:23,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647344295] [2020-09-24 16:11:23,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:23,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-09-24 16:11:23,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485911711] [2020-09-24 16:11:23,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-09-24 16:11:23,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:23,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-09-24 16:11:23,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-09-24 16:11:23,517 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 54 states. [2020-09-24 16:11:26,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:26,345 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2020-09-24 16:11:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-09-24 16:11:26,346 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 208 [2020-09-24 16:11:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:26,348 INFO L225 Difference]: With dead ends: 248 [2020-09-24 16:11:26,348 INFO L226 Difference]: Without dead ends: 223 [2020-09-24 16:11:26,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-09-24 16:11:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-24 16:11:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 218. [2020-09-24 16:11:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-09-24 16:11:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 220 transitions. [2020-09-24 16:11:26,355 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 220 transitions. Word has length 208 [2020-09-24 16:11:26,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:26,356 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 220 transitions. [2020-09-24 16:11:26,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-09-24 16:11:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 220 transitions. [2020-09-24 16:11:26,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-09-24 16:11:26,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:26,357 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 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] [2020-09-24 16:11:26,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-24 16:11:26,358 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:26,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:26,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1520680036, now seen corresponding path program 25 times [2020-09-24 16:11:26,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:26,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532722490] [2020-09-24 16:11:26,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:26,679 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:26,679 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:26,679 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:26,679 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:26,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-09-24 16:11:26,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:26,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-09-24 16:11:26,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:26,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-09-24 16:11:26,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:11:26,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-09-24 16:11:26,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0