/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --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-lit/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:05:43,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:05:43,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:05:43,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:05:43,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:05:43,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:05:43,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:05:43,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:05:43,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:05:43,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:05:43,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:05:43,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:05:43,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:05:43,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:05:43,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:05:43,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:05:43,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:05:43,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:05:43,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:05:43,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:05:43,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:05:43,770 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:05:43,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:05:43,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:05:43,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:05:43,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:05:43,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:05:43,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:05:43,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:05:43,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:05:43,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:05:43,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:05:43,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:05:43,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:05:43,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:05:43,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:05:43,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:05:43,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:05:43,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:05:43,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:05:43,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:05:43,787 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 00:05:43,811 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:05:43,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:05:43,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:05:43,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:05:43,813 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:05:43,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:05:43,813 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:05:43,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:05:43,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:05:43,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:05:43,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:05:43,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:05:43,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:05:43,815 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:05:43,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:05:43,815 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:05:43,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:05:43,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:05:43,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:05:43,816 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:05:43,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:05:43,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:05:43,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:05:43,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:05:43,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:05:43,817 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:05:43,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:05:43,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:05:43,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:05:43,818 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-09-25 00:05:44,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:05:44,275 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:05:44,279 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:05:44,282 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:05:44,282 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:05:44,283 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-09-25 00:05:44,370 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d1415b08/3d21e758822b4728a1f688154660b0c4/FLAG5e228a52b [2020-09-25 00:05:44,900 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:05:44,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-09-25 00:05:44,909 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d1415b08/3d21e758822b4728a1f688154660b0c4/FLAG5e228a52b [2020-09-25 00:05:45,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d1415b08/3d21e758822b4728a1f688154660b0c4 [2020-09-25 00:05:45,250 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:05:45,255 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:05:45,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:05:45,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:05:45,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:05:45,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:05:45" (1/1) ... [2020-09-25 00:05:45,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@786a7c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:45, skipping insertion in model container [2020-09-25 00:05:45,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:05:45" (1/1) ... [2020-09-25 00:05:45,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:05:45,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:05:45,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:05:45,507 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:05:45,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:05:45,545 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:05:45,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:45 WrapperNode [2020-09-25 00:05:45,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:05:45,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:05:45,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:05:45,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:05:45,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:45" (1/1) ... [2020-09-25 00:05:45,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:45" (1/1) ... [2020-09-25 00:05:45,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:45" (1/1) ... [2020-09-25 00:05:45,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:45" (1/1) ... [2020-09-25 00:05:45,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:45" (1/1) ... [2020-09-25 00:05:45,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:45" (1/1) ... [2020-09-25 00:05:45,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:45" (1/1) ... [2020-09-25 00:05:45,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:05:45,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:05:45,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:05:45,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:05:45,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:05:45,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:05:45,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:05:45,742 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 00:05:45,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:05:45,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:05:45,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:05:45,743 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 00:05:45,743 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 00:05:45,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:05:45,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 00:05:45,744 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:05:45,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:05:45,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:05:45,962 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:05:45,963 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 00:05:45,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:05:45 BoogieIcfgContainer [2020-09-25 00:05:45,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:05:45,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:05:45,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:05:45,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:05:45,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:05:45" (1/3) ... [2020-09-25 00:05:45,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7174cb0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:05:45, skipping insertion in model container [2020-09-25 00:05:45,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:45" (2/3) ... [2020-09-25 00:05:45,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7174cb0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:05:45, skipping insertion in model container [2020-09-25 00:05:45,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:05:45" (3/3) ... [2020-09-25 00:05:45,984 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-09-25 00:05:45,998 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:05:46,008 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:05:46,047 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:05:46,072 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:05:46,073 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:05:46,073 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:05:46,073 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:05:46,073 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:05:46,073 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:05:46,073 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:05:46,073 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:05:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-25 00:05:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 00:05:46,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:46,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:46,100 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:46,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1930258608, now seen corresponding path program 1 times [2020-09-25 00:05:46,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:46,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668480405] [2020-09-25 00:05:46,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:46,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:46,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:46,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 00:05:46,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:46,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-25 00:05:46,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:46,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:46,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 00:05:46,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:46,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 00:05:46,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:46,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:46,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:46,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:46,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:46,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:05:46,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:46,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:46,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:46,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:46,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:46,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668480405] [2020-09-25 00:05:46,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:05:46,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 00:05:46,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674065281] [2020-09-25 00:05:46,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 00:05:46,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:46,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 00:05:46,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 00:05:46,346 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-25 00:05:46,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:46,371 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-09-25 00:05:46,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 00:05:46,373 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-09-25 00:05:46,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:46,381 INFO L225 Difference]: With dead ends: 48 [2020-09-25 00:05:46,381 INFO L226 Difference]: Without dead ends: 22 [2020-09-25 00:05:46,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 00:05:46,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-25 00:05:46,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-25 00:05:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 00:05:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-09-25 00:05:46,425 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-09-25 00:05:46,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:46,425 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-09-25 00:05:46,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 00:05:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-09-25 00:05:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 00:05:46,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:46,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:46,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:05:46,427 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:46,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:46,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1900705936, now seen corresponding path program 1 times [2020-09-25 00:05:46,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:46,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283747511] [2020-09-25 00:05:46,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:46,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:46,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:46,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 00:05:46,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:46,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-25 00:05:46,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:46,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:05:46,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:05:46,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 00:05:46,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:46,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:46,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:46,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:46,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:46,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:46,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:05:46,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:46,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:46,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:46,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:46,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:46,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283747511] [2020-09-25 00:05:46,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:05:46,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:05:46,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909836233] [2020-09-25 00:05:46,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:05:46,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:46,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:05:46,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:05:46,558 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 3 states. [2020-09-25 00:05:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:46,588 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-09-25 00:05:46,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:05:46,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-25 00:05:46,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:46,590 INFO L225 Difference]: With dead ends: 29 [2020-09-25 00:05:46,590 INFO L226 Difference]: Without dead ends: 24 [2020-09-25 00:05:46,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:05:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-25 00:05:46,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-25 00:05:46,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-25 00:05:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-09-25 00:05:46,598 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-09-25 00:05:46,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:46,598 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-09-25 00:05:46,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:05:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-09-25 00:05:46,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 00:05:46,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:46,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:46,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:05:46,600 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:46,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:46,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1024587775, now seen corresponding path program 1 times [2020-09-25 00:05:46,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:46,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930454335] [2020-09-25 00:05:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:46,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:46,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:46,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:46,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:46,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 00:05:46,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 00:05:46,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-09-25 00:05:46,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:46,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 00:05:46,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:05:46,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 00:05:46,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 00:05:46,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:46,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:46,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:46,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:46,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:46,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:05:46,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:46,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:46,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:46,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:46,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:46,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930454335] [2020-09-25 00:05:46,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:46,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-25 00:05:46,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349780840] [2020-09-25 00:05:47,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 00:05:47,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:47,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 00:05:47,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:05:47,001 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 4 states. [2020-09-25 00:05:47,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:47,037 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-09-25 00:05:47,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 00:05:47,038 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-09-25 00:05:47,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:47,039 INFO L225 Difference]: With dead ends: 36 [2020-09-25 00:05:47,039 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 00:05:47,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-25 00:05:47,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 00:05:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-09-25 00:05:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-25 00:05:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-09-25 00:05:47,047 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-09-25 00:05:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:47,048 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-09-25 00:05:47,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 00:05:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-09-25 00:05:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 00:05:47,049 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:47,049 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:47,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:05:47,050 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:47,050 INFO L82 PathProgramCache]: Analyzing trace with hash 713803248, now seen corresponding path program 2 times [2020-09-25 00:05:47,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:47,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530064502] [2020-09-25 00:05:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:47,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:47,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:47,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:47,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:47,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:47,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 00:05:47,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 00:05:47,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-09-25 00:05:47,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:47,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:05:47,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:05:47,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 00:05:47,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:47,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:47,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:47,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:47,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:47,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:47,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:05:47,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:47,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:47,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:47,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:47,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:47,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530064502] [2020-09-25 00:05:47,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:47,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 00:05:47,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029405768] [2020-09-25 00:05:47,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:05:47,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:47,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:05:47,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:05:47,371 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-09-25 00:05:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:47,422 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-09-25 00:05:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 00:05:47,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-25 00:05:47,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:47,424 INFO L225 Difference]: With dead ends: 43 [2020-09-25 00:05:47,424 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 00:05:47,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:05:47,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 00:05:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-09-25 00:05:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 00:05:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-09-25 00:05:47,432 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-09-25 00:05:47,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:47,433 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-09-25 00:05:47,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:05:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-09-25 00:05:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-25 00:05:47,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:47,434 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:47,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:05:47,435 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:47,435 INFO L82 PathProgramCache]: Analyzing trace with hash 761923231, now seen corresponding path program 3 times [2020-09-25 00:05:47,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:47,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396078916] [2020-09-25 00:05:47,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:47,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:47,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:47,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:47,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:47,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:47,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:47,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 00:05:47,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 00:05:47,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-09-25 00:05:47,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:47,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 00:05:47,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:05:47,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 00:05:47,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:47,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:48,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:48,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:48,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:48,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:05:48,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:48,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:48,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:48,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:48,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:48,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396078916] [2020-09-25 00:05:48,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:48,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 00:05:48,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523625364] [2020-09-25 00:05:48,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 00:05:48,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:48,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 00:05:48,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-25 00:05:48,016 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 6 states. [2020-09-25 00:05:48,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:48,099 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-25 00:05:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 00:05:48,102 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-09-25 00:05:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:48,103 INFO L225 Difference]: With dead ends: 50 [2020-09-25 00:05:48,103 INFO L226 Difference]: Without dead ends: 45 [2020-09-25 00:05:48,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-25 00:05:48,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-25 00:05:48,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-09-25 00:05:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-25 00:05:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-09-25 00:05:48,119 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 30 [2020-09-25 00:05:48,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:48,120 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-09-25 00:05:48,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 00:05:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-09-25 00:05:48,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 00:05:48,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:48,123 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:48,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 00:05:48,124 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:48,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:48,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1508648112, now seen corresponding path program 4 times [2020-09-25 00:05:48,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:48,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442871119] [2020-09-25 00:05:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:48,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:48,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 00:05:48,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 00:05:48,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-09-25 00:05:48,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:48,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:05:48,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:05:48,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 00:05:48,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:48,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:48,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:48,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:48,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:48,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:05:48,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:48,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:48,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:48,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:48,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:48,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442871119] [2020-09-25 00:05:48,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:48,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 00:05:48,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534221264] [2020-09-25 00:05:48,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 00:05:48,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:48,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 00:05:48,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-25 00:05:48,754 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 7 states. [2020-09-25 00:05:48,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:48,852 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-09-25 00:05:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 00:05:48,853 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-09-25 00:05:48,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:48,857 INFO L225 Difference]: With dead ends: 57 [2020-09-25 00:05:48,857 INFO L226 Difference]: Without dead ends: 52 [2020-09-25 00:05:48,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-25 00:05:48,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-25 00:05:48,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-09-25 00:05:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 00:05:48,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-09-25 00:05:48,875 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 35 [2020-09-25 00:05:48,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:48,876 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-09-25 00:05:48,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 00:05:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-09-25 00:05:48,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 00:05:48,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:48,881 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:48,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 00:05:48,882 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:48,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:48,883 INFO L82 PathProgramCache]: Analyzing trace with hash 544755007, now seen corresponding path program 5 times [2020-09-25 00:05:48,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:48,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313212281] [2020-09-25 00:05:48,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:48,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:49,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:49,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:49,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 00:05:49,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 00:05:49,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-09-25 00:05:49,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:49,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 00:05:49,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:05:49,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 00:05:49,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:49,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:49,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:49,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:49,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:49,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:49,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:05:49,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:49,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:49,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:49,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:49,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:49,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313212281] [2020-09-25 00:05:49,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:49,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 00:05:49,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731880307] [2020-09-25 00:05:49,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 00:05:49,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:49,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 00:05:49,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:05:49,709 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 8 states. [2020-09-25 00:05:49,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:49,760 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-09-25 00:05:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 00:05:49,760 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-09-25 00:05:49,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:49,762 INFO L225 Difference]: With dead ends: 64 [2020-09-25 00:05:49,762 INFO L226 Difference]: Without dead ends: 59 [2020-09-25 00:05:49,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:05:49,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-25 00:05:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-09-25 00:05:49,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 00:05:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-09-25 00:05:49,771 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 40 [2020-09-25 00:05:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:49,771 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-09-25 00:05:49,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 00:05:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-09-25 00:05:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-25 00:05:49,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:49,773 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:49,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 00:05:49,774 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:49,774 INFO L82 PathProgramCache]: Analyzing trace with hash -267863888, now seen corresponding path program 6 times [2020-09-25 00:05:49,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:49,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625502029] [2020-09-25 00:05:49,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:49,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:49,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:49,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:49,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:49,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:49,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:49,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:50,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 00:05:50,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 00:05:50,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 818 [2020-09-25 00:05:50,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:50,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:05:50,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:05:50,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 00:05:50,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:50,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:50,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:50,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:50,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:50,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:05:50,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:50,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:50,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:50,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:50,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:50,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625502029] [2020-09-25 00:05:50,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:50,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 00:05:50,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157757422] [2020-09-25 00:05:50,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 00:05:50,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:50,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 00:05:50,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-25 00:05:50,691 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 9 states. [2020-09-25 00:05:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:50,761 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2020-09-25 00:05:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 00:05:50,762 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-09-25 00:05:50,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:50,763 INFO L225 Difference]: With dead ends: 71 [2020-09-25 00:05:50,764 INFO L226 Difference]: Without dead ends: 66 [2020-09-25 00:05:50,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-25 00:05:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-25 00:05:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-09-25 00:05:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-25 00:05:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2020-09-25 00:05:50,781 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 45 [2020-09-25 00:05:50,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:50,785 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2020-09-25 00:05:50,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 00:05:50,785 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2020-09-25 00:05:50,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 00:05:50,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:50,788 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:50,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 00:05:50,788 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:50,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:50,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1311323169, now seen corresponding path program 7 times [2020-09-25 00:05:50,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:50,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531959392] [2020-09-25 00:05:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:50,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:51,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:51,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:51,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:51,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-25 00:05:51,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 00:05:51,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-09-25 00:05:51,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:51,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 00:05:51,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:05:51,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 00:05:51,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:51,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:51,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:51,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:51,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:51,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:51,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:05:51,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:51,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:51,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:51,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:51,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:51,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531959392] [2020-09-25 00:05:51,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:51,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 00:05:51,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91983199] [2020-09-25 00:05:51,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 00:05:51,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:51,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 00:05:51,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-25 00:05:51,976 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand 10 states. [2020-09-25 00:05:52,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:52,046 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-09-25 00:05:52,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 00:05:52,047 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-09-25 00:05:52,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:52,048 INFO L225 Difference]: With dead ends: 78 [2020-09-25 00:05:52,048 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 00:05:52,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-25 00:05:52,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 00:05:52,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-09-25 00:05:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-25 00:05:52,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2020-09-25 00:05:52,065 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 50 [2020-09-25 00:05:52,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:52,066 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2020-09-25 00:05:52,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 00:05:52,066 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2020-09-25 00:05:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 00:05:52,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:52,070 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:52,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 00:05:52,070 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:52,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:52,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1659871728, now seen corresponding path program 8 times [2020-09-25 00:05:52,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:52,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759328119] [2020-09-25 00:05:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:52,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:52,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:52,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:52,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:52,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:52,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:52,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:52,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:52,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:52,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:53,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 00:05:53,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 00:05:53,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1150 [2020-09-25 00:05:53,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:53,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:05:53,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:05:53,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 00:05:53,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:53,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:53,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:53,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:53,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:53,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:05:53,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:53,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:53,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:53,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:53,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:53,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759328119] [2020-09-25 00:05:53,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:53,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 00:05:53,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957300545] [2020-09-25 00:05:53,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 00:05:53,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:53,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 00:05:53,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-25 00:05:53,346 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 11 states. [2020-09-25 00:05:53,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:53,411 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2020-09-25 00:05:53,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 00:05:53,412 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-09-25 00:05:53,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:53,413 INFO L225 Difference]: With dead ends: 85 [2020-09-25 00:05:53,413 INFO L226 Difference]: Without dead ends: 80 [2020-09-25 00:05:53,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-25 00:05:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-25 00:05:53,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-09-25 00:05:53,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-25 00:05:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2020-09-25 00:05:53,426 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 55 [2020-09-25 00:05:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:53,429 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2020-09-25 00:05:53,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 00:05:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2020-09-25 00:05:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 00:05:53,433 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:53,433 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:53,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 00:05:53,433 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:53,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:53,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1151304319, now seen corresponding path program 9 times [2020-09-25 00:05:53,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:53,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533259996] [2020-09-25 00:05:53,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:53,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:53,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:54,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:54,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 00:05:54,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 00:05:54,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1250 [2020-09-25 00:05:54,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:54,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 00:05:54,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:05:54,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-25 00:05:54,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:54,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:54,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:54,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:54,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:54,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:54,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:05:54,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:54,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:54,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:54,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:54,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:54,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533259996] [2020-09-25 00:05:54,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:54,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 00:05:54,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226115293] [2020-09-25 00:05:54,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 00:05:54,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:54,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 00:05:54,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:05:54,893 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 12 states. [2020-09-25 00:05:54,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:54,974 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-09-25 00:05:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 00:05:54,975 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2020-09-25 00:05:54,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:54,976 INFO L225 Difference]: With dead ends: 92 [2020-09-25 00:05:54,976 INFO L226 Difference]: Without dead ends: 87 [2020-09-25 00:05:54,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-25 00:05:54,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-25 00:05:54,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-09-25 00:05:54,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-25 00:05:54,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2020-09-25 00:05:54,992 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 60 [2020-09-25 00:05:54,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:54,992 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2020-09-25 00:05:54,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 00:05:54,992 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2020-09-25 00:05:54,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-25 00:05:54,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:54,993 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:54,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 00:05:54,994 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:54,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:54,994 INFO L82 PathProgramCache]: Analyzing trace with hash 709938032, now seen corresponding path program 10 times [2020-09-25 00:05:54,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:54,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176599052] [2020-09-25 00:05:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:55,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:56,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 00:05:56,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-25 00:05:56,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1250 [2020-09-25 00:05:56,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:56,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 00:05:56,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:05:56,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 00:05:56,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:56,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:56,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:56,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:56,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:56,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:05:56,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:56,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:56,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:56,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:56,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:56,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176599052] [2020-09-25 00:05:56,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:56,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 00:05:56,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064501112] [2020-09-25 00:05:56,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 00:05:56,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:56,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 00:05:56,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-25 00:05:56,412 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand 13 states. [2020-09-25 00:05:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:56,482 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2020-09-25 00:05:56,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 00:05:56,482 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-09-25 00:05:56,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:56,483 INFO L225 Difference]: With dead ends: 99 [2020-09-25 00:05:56,483 INFO L226 Difference]: Without dead ends: 94 [2020-09-25 00:05:56,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-25 00:05:56,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-25 00:05:56,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-09-25 00:05:56,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-25 00:05:56,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2020-09-25 00:05:56,498 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 65 [2020-09-25 00:05:56,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:56,499 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2020-09-25 00:05:56,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 00:05:56,499 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2020-09-25 00:05:56,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-25 00:05:56,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:56,502 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:56,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 00:05:56,503 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:56,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:56,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1553174241, now seen corresponding path program 11 times [2020-09-25 00:05:56,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:56,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972644362] [2020-09-25 00:05:56,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:56,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:57,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-25 00:05:57,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 00:05:57,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1432 [2020-09-25 00:05:57,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:57,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 00:05:57,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:05:57,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-09-25 00:05:57,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:58,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:58,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:58,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:58,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:58,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:05:58,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:58,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:58,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:58,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:58,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:58,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972644362] [2020-09-25 00:05:58,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:58,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 00:05:58,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934478130] [2020-09-25 00:05:58,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 00:05:58,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:58,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 00:05:58,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-25 00:05:58,087 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand 14 states. [2020-09-25 00:05:58,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:58,190 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2020-09-25 00:05:58,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 00:05:58,191 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2020-09-25 00:05:58,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:58,192 INFO L225 Difference]: With dead ends: 106 [2020-09-25 00:05:58,192 INFO L226 Difference]: Without dead ends: 101 [2020-09-25 00:05:58,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-25 00:05:58,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-25 00:05:58,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-09-25 00:05:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 00:05:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2020-09-25 00:05:58,201 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 70 [2020-09-25 00:05:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:58,201 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2020-09-25 00:05:58,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 00:05:58,202 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2020-09-25 00:05:58,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 00:05:58,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:58,203 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:58,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 00:05:58,204 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:58,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1567621328, now seen corresponding path program 12 times [2020-09-25 00:05:58,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:58,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207661024] [2020-09-25 00:05:58,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:58,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:59,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:59,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 00:05:59,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-09-25 00:05:59,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1688 [2020-09-25 00:05:59,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 00:05:59,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:05:59,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-25 00:05:59,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:00,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:00,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:00,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:00,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:00,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:06:00,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:00,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:00,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:00,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:00,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:00,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207661024] [2020-09-25 00:06:00,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:00,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 00:06:00,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355283393] [2020-09-25 00:06:00,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 00:06:00,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:00,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 00:06:00,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-25 00:06:00,118 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand 15 states. [2020-09-25 00:06:00,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:00,227 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2020-09-25 00:06:00,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 00:06:00,228 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2020-09-25 00:06:00,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:00,229 INFO L225 Difference]: With dead ends: 113 [2020-09-25 00:06:00,229 INFO L226 Difference]: Without dead ends: 108 [2020-09-25 00:06:00,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-25 00:06:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-25 00:06:00,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-09-25 00:06:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-25 00:06:00,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 133 transitions. [2020-09-25 00:06:00,239 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 133 transitions. Word has length 75 [2020-09-25 00:06:00,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:00,239 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 133 transitions. [2020-09-25 00:06:00,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 00:06:00,240 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 133 transitions. [2020-09-25 00:06:00,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-25 00:06:00,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:00,248 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:00,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 00:06:00,248 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:00,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:00,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1604872257, now seen corresponding path program 13 times [2020-09-25 00:06:00,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:00,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153647758] [2020-09-25 00:06:00,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:00,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:00,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:02,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-25 00:06:02,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-25 00:06:02,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1826 [2020-09-25 00:06:02,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:02,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 00:06:02,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:06:02,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-09-25 00:06:02,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:02,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:02,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:02,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:02,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:02,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:02,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:02,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:02,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:02,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:02,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153647758] [2020-09-25 00:06:02,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:02,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 00:06:02,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720392892] [2020-09-25 00:06:02,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 00:06:02,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:02,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 00:06:02,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-25 00:06:02,258 INFO L87 Difference]: Start difference. First operand 107 states and 133 transitions. Second operand 16 states. [2020-09-25 00:06:02,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:02,338 INFO L93 Difference]: Finished difference Result 120 states and 148 transitions. [2020-09-25 00:06:02,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 00:06:02,338 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2020-09-25 00:06:02,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:02,339 INFO L225 Difference]: With dead ends: 120 [2020-09-25 00:06:02,339 INFO L226 Difference]: Without dead ends: 115 [2020-09-25 00:06:02,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-25 00:06:02,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-25 00:06:02,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-09-25 00:06:02,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-25 00:06:02,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2020-09-25 00:06:02,345 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 80 [2020-09-25 00:06:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:02,345 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2020-09-25 00:06:02,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 00:06:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2020-09-25 00:06:02,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-25 00:06:02,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:02,346 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:02,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 00:06:02,347 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:02,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:02,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1533805008, now seen corresponding path program 14 times [2020-09-25 00:06:02,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:02,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541811722] [2020-09-25 00:06:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:02,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:02,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:04,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-25 00:06:04,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-09-25 00:06:04,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1937 [2020-09-25 00:06:04,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:04,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 00:06:04,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:06:04,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-25 00:06:04,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:04,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:04,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:04,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:04,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:04,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:04,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:04,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:04,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:04,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:04,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:04,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541811722] [2020-09-25 00:06:04,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:04,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 00:06:04,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601402785] [2020-09-25 00:06:04,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 00:06:04,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:04,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 00:06:04,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-25 00:06:04,561 INFO L87 Difference]: Start difference. First operand 114 states and 142 transitions. Second operand 17 states. [2020-09-25 00:06:04,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:04,689 INFO L93 Difference]: Finished difference Result 127 states and 157 transitions. [2020-09-25 00:06:04,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 00:06:04,689 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-09-25 00:06:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:04,691 INFO L225 Difference]: With dead ends: 127 [2020-09-25 00:06:04,691 INFO L226 Difference]: Without dead ends: 122 [2020-09-25 00:06:04,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-25 00:06:04,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-25 00:06:04,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-09-25 00:06:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-25 00:06:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 151 transitions. [2020-09-25 00:06:04,701 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 151 transitions. Word has length 85 [2020-09-25 00:06:04,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:04,702 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 151 transitions. [2020-09-25 00:06:04,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 00:06:04,702 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 151 transitions. [2020-09-25 00:06:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-25 00:06:04,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:04,704 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:04,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 00:06:04,705 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:04,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:04,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1258621345, now seen corresponding path program 15 times [2020-09-25 00:06:04,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:04,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735819586] [2020-09-25 00:06:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:04,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:05,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:05,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:05,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:06,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:06,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-25 00:06:06,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-09-25 00:06:06,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2188 [2020-09-25 00:06:06,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:06,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-25 00:06:06,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:06:06,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-25 00:06:06,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:07,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:07,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:07,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:07,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:07,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:07,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:07,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:07,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:07,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:07,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:07,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735819586] [2020-09-25 00:06:07,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:07,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 00:06:07,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696099777] [2020-09-25 00:06:07,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 00:06:07,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:07,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 00:06:07,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-25 00:06:07,146 INFO L87 Difference]: Start difference. First operand 121 states and 151 transitions. Second operand 18 states. [2020-09-25 00:06:07,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:07,284 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2020-09-25 00:06:07,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 00:06:07,285 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 90 [2020-09-25 00:06:07,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:07,286 INFO L225 Difference]: With dead ends: 134 [2020-09-25 00:06:07,286 INFO L226 Difference]: Without dead ends: 129 [2020-09-25 00:06:07,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-25 00:06:07,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-25 00:06:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-09-25 00:06:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-25 00:06:07,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 160 transitions. [2020-09-25 00:06:07,294 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 160 transitions. Word has length 90 [2020-09-25 00:06:07,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:07,295 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 160 transitions. [2020-09-25 00:06:07,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 00:06:07,295 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 160 transitions. [2020-09-25 00:06:07,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-25 00:06:07,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:07,297 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:07,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 00:06:07,298 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:07,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:07,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1986184080, now seen corresponding path program 16 times [2020-09-25 00:06:07,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:07,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667497396] [2020-09-25 00:06:07,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:07,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:10,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-09-25 00:06:10,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-09-25 00:06:10,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2932 [2020-09-25 00:06:10,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:10,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 00:06:10,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:06:10,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-09-25 00:06:10,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:10,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:10,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:10,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:10,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:10,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:10,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:10,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:10,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:10,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:10,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:10,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667497396] [2020-09-25 00:06:10,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:10,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 00:06:10,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069240419] [2020-09-25 00:06:10,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 00:06:10,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:10,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 00:06:10,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-25 00:06:10,473 INFO L87 Difference]: Start difference. First operand 128 states and 160 transitions. Second operand 19 states. [2020-09-25 00:06:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:10,603 INFO L93 Difference]: Finished difference Result 141 states and 175 transitions. [2020-09-25 00:06:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 00:06:10,603 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 95 [2020-09-25 00:06:10,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:10,605 INFO L225 Difference]: With dead ends: 141 [2020-09-25 00:06:10,605 INFO L226 Difference]: Without dead ends: 136 [2020-09-25 00:06:10,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-25 00:06:10,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-25 00:06:10,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-09-25 00:06:10,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-25 00:06:10,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 169 transitions. [2020-09-25 00:06:10,611 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 169 transitions. Word has length 95 [2020-09-25 00:06:10,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:10,612 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 169 transitions. [2020-09-25 00:06:10,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 00:06:10,612 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 169 transitions. [2020-09-25 00:06:10,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-25 00:06:10,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:10,614 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:10,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-25 00:06:10,615 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:10,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:10,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1569682177, now seen corresponding path program 17 times [2020-09-25 00:06:10,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:10,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636591433] [2020-09-25 00:06:10,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:10,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:11,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:13,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-09-25 00:06:13,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-25 00:06:13,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2514 [2020-09-25 00:06:13,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:13,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-25 00:06:13,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:06:13,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-09-25 00:06:13,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:13,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:13,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:13,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:13,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:13,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:13,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:13,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:13,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:13,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:13,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:13,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636591433] [2020-09-25 00:06:13,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:13,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 00:06:13,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901791725] [2020-09-25 00:06:13,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 00:06:13,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:13,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 00:06:13,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-25 00:06:13,448 INFO L87 Difference]: Start difference. First operand 135 states and 169 transitions. Second operand 20 states. [2020-09-25 00:06:13,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:13,570 INFO L93 Difference]: Finished difference Result 148 states and 184 transitions. [2020-09-25 00:06:13,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 00:06:13,571 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-09-25 00:06:13,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:13,572 INFO L225 Difference]: With dead ends: 148 [2020-09-25 00:06:13,572 INFO L226 Difference]: Without dead ends: 143 [2020-09-25 00:06:13,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-25 00:06:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-25 00:06:13,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-09-25 00:06:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-25 00:06:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 178 transitions. [2020-09-25 00:06:13,579 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 178 transitions. Word has length 100 [2020-09-25 00:06:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:13,579 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 178 transitions. [2020-09-25 00:06:13,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 00:06:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 178 transitions. [2020-09-25 00:06:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-25 00:06:13,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:13,581 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:13,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-25 00:06:13,581 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:13,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:13,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1308471056, now seen corresponding path program 18 times [2020-09-25 00:06:13,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:13,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399778198] [2020-09-25 00:06:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:13,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:14,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:14,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:14,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:14,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:14,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:16,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:16,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-09-25 00:06:16,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-09-25 00:06:16,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3091 [2020-09-25 00:06:16,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:16,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 00:06:16,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:06:16,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-09-25 00:06:16,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:16,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:16,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:17,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:17,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:17,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:17,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:17,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:17,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:17,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:17,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:17,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399778198] [2020-09-25 00:06:17,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:17,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 00:06:17,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292739789] [2020-09-25 00:06:17,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 00:06:17,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:17,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 00:06:17,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-25 00:06:17,014 INFO L87 Difference]: Start difference. First operand 142 states and 178 transitions. Second operand 21 states. [2020-09-25 00:06:17,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:17,156 INFO L93 Difference]: Finished difference Result 155 states and 193 transitions. [2020-09-25 00:06:17,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 00:06:17,157 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2020-09-25 00:06:17,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:17,158 INFO L225 Difference]: With dead ends: 155 [2020-09-25 00:06:17,158 INFO L226 Difference]: Without dead ends: 150 [2020-09-25 00:06:17,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-25 00:06:17,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-25 00:06:17,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-09-25 00:06:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-25 00:06:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 187 transitions. [2020-09-25 00:06:17,170 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 187 transitions. Word has length 105 [2020-09-25 00:06:17,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:17,171 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 187 transitions. [2020-09-25 00:06:17,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-25 00:06:17,171 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 187 transitions. [2020-09-25 00:06:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-25 00:06:17,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:17,172 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:17,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-25 00:06:17,173 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:17,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:17,173 INFO L82 PathProgramCache]: Analyzing trace with hash 290610079, now seen corresponding path program 19 times [2020-09-25 00:06:17,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:17,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010484306] [2020-09-25 00:06:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:17,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:20,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:20,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-25 00:06:20,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-09-25 00:06:20,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2873 [2020-09-25 00:06:20,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-25 00:06:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:06:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-09-25 00:06:20,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:20,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:20,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:20,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:20,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:20,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:20,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:20,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:20,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:20,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:20,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:20,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:20,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010484306] [2020-09-25 00:06:20,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:20,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-25 00:06:20,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033324837] [2020-09-25 00:06:20,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-25 00:06:20,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:20,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-25 00:06:20,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-25 00:06:20,425 INFO L87 Difference]: Start difference. First operand 149 states and 187 transitions. Second operand 22 states. [2020-09-25 00:06:20,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:20,577 INFO L93 Difference]: Finished difference Result 162 states and 202 transitions. [2020-09-25 00:06:20,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 00:06:20,578 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 110 [2020-09-25 00:06:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:20,579 INFO L225 Difference]: With dead ends: 162 [2020-09-25 00:06:20,579 INFO L226 Difference]: Without dead ends: 157 [2020-09-25 00:06:20,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-25 00:06:20,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-25 00:06:20,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-09-25 00:06:20,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-25 00:06:20,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 196 transitions. [2020-09-25 00:06:20,586 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 196 transitions. Word has length 110 [2020-09-25 00:06:20,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:20,586 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 196 transitions. [2020-09-25 00:06:20,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-25 00:06:20,586 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 196 transitions. [2020-09-25 00:06:20,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-25 00:06:20,587 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:20,587 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:20,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-25 00:06:20,588 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:20,588 INFO L82 PathProgramCache]: Analyzing trace with hash -15161776, now seen corresponding path program 20 times [2020-09-25 00:06:20,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:20,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870594064] [2020-09-25 00:06:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:20,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:20,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:20,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:20,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:20,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:20,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:20,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:20,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:20,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:20,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:20,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:20,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:20,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:21,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:21,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:21,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:21,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:21,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:21,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:21,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:21,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:21,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:24,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:24,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-09-25 00:06:24,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-09-25 00:06:24,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4082 [2020-09-25 00:06:24,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:24,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 00:06:24,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:06:24,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-25 00:06:24,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:25,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:25,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:25,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:25,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:25,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:25,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:25,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:25,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:25,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:25,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:25,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870594064] [2020-09-25 00:06:25,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:25,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 00:06:25,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181985674] [2020-09-25 00:06:25,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 00:06:25,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:25,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 00:06:25,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-25 00:06:25,043 INFO L87 Difference]: Start difference. First operand 156 states and 196 transitions. Second operand 23 states. [2020-09-25 00:06:25,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:25,207 INFO L93 Difference]: Finished difference Result 169 states and 211 transitions. [2020-09-25 00:06:25,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-25 00:06:25,211 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 115 [2020-09-25 00:06:25,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:25,212 INFO L225 Difference]: With dead ends: 169 [2020-09-25 00:06:25,212 INFO L226 Difference]: Without dead ends: 164 [2020-09-25 00:06:25,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-25 00:06:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-09-25 00:06:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-09-25 00:06:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-25 00:06:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 205 transitions. [2020-09-25 00:06:25,219 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 205 transitions. Word has length 115 [2020-09-25 00:06:25,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:25,220 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 205 transitions. [2020-09-25 00:06:25,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 00:06:25,220 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 205 transitions. [2020-09-25 00:06:25,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-09-25 00:06:25,221 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:25,221 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:25,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-25 00:06:25,222 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:25,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:25,222 INFO L82 PathProgramCache]: Analyzing trace with hash 834298431, now seen corresponding path program 21 times [2020-09-25 00:06:25,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:25,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178698837] [2020-09-25 00:06:25,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:25,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:26,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:26,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:26,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:29,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:29,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-09-25 00:06:29,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-09-25 00:06:29,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4065 [2020-09-25 00:06:29,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:29,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-25 00:06:29,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:06:29,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-09-25 00:06:29,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:29,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:29,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:29,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:29,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:29,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:29,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:29,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:29,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:29,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:29,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:29,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:29,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178698837] [2020-09-25 00:06:29,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:29,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 00:06:29,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509269704] [2020-09-25 00:06:29,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 00:06:29,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:29,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 00:06:29,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-09-25 00:06:29,710 INFO L87 Difference]: Start difference. First operand 163 states and 205 transitions. Second operand 24 states. [2020-09-25 00:06:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:29,849 INFO L93 Difference]: Finished difference Result 176 states and 220 transitions. [2020-09-25 00:06:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 00:06:29,850 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 120 [2020-09-25 00:06:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:29,851 INFO L225 Difference]: With dead ends: 176 [2020-09-25 00:06:29,852 INFO L226 Difference]: Without dead ends: 171 [2020-09-25 00:06:29,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-09-25 00:06:29,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-25 00:06:29,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2020-09-25 00:06:29,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-25 00:06:29,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 214 transitions. [2020-09-25 00:06:29,866 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 214 transitions. Word has length 120 [2020-09-25 00:06:29,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:29,867 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 214 transitions. [2020-09-25 00:06:29,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 00:06:29,867 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 214 transitions. [2020-09-25 00:06:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-09-25 00:06:29,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:29,871 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:29,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-25 00:06:29,872 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:29,872 INFO L82 PathProgramCache]: Analyzing trace with hash 768328624, now seen corresponding path program 22 times [2020-09-25 00:06:29,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:29,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952932387] [2020-09-25 00:06:29,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:29,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:29,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:29,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:29,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:29,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:29,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:29,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:29,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:29,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:30,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:30,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:30,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:30,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:30,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:30,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:30,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:30,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:30,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:30,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:30,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:30,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:30,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:30,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:30,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:33,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:33,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-09-25 00:06:33,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-09-25 00:06:33,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3845 [2020-09-25 00:06:33,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:33,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 00:06:33,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:06:33,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-09-25 00:06:33,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:34,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:34,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:34,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:34,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:34,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:34,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:34,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:34,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:34,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:34,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:34,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952932387] [2020-09-25 00:06:34,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:34,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-25 00:06:34,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831821135] [2020-09-25 00:06:34,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-25 00:06:34,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:34,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-25 00:06:34,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-09-25 00:06:34,148 INFO L87 Difference]: Start difference. First operand 170 states and 214 transitions. Second operand 25 states. [2020-09-25 00:06:34,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:34,330 INFO L93 Difference]: Finished difference Result 183 states and 229 transitions. [2020-09-25 00:06:34,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-25 00:06:34,331 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 125 [2020-09-25 00:06:34,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:34,333 INFO L225 Difference]: With dead ends: 183 [2020-09-25 00:06:34,333 INFO L226 Difference]: Without dead ends: 178 [2020-09-25 00:06:34,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-09-25 00:06:34,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-25 00:06:34,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-09-25 00:06:34,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-25 00:06:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 223 transitions. [2020-09-25 00:06:34,341 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 223 transitions. Word has length 125 [2020-09-25 00:06:34,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:34,342 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 223 transitions. [2020-09-25 00:06:34,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-25 00:06:34,342 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 223 transitions. [2020-09-25 00:06:34,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-25 00:06:34,343 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:34,343 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:34,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-25 00:06:34,344 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:34,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:34,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1531093215, now seen corresponding path program 23 times [2020-09-25 00:06:34,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:34,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438217437] [2020-09-25 00:06:34,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:34,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:38,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:38,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-09-25 00:06:38,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-09-25 00:06:38,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4313 [2020-09-25 00:06:38,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:38,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-09-25 00:06:38,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 00:06:38,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-25 00:06:38,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:39,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:39,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:39,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:39,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:39,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:39,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:39,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:39,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:39,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:39,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:39,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438217437] [2020-09-25 00:06:39,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:39,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-25 00:06:39,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567308580] [2020-09-25 00:06:39,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-25 00:06:39,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:39,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-25 00:06:39,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-09-25 00:06:39,131 INFO L87 Difference]: Start difference. First operand 177 states and 223 transitions. Second operand 26 states. [2020-09-25 00:06:39,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:39,326 INFO L93 Difference]: Finished difference Result 190 states and 238 transitions. [2020-09-25 00:06:39,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-25 00:06:39,326 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 130 [2020-09-25 00:06:39,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:39,328 INFO L225 Difference]: With dead ends: 190 [2020-09-25 00:06:39,328 INFO L226 Difference]: Without dead ends: 185 [2020-09-25 00:06:39,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-09-25 00:06:39,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-25 00:06:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-09-25 00:06:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-25 00:06:39,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2020-09-25 00:06:39,335 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 130 [2020-09-25 00:06:39,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:39,336 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2020-09-25 00:06:39,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-25 00:06:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2020-09-25 00:06:39,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-25 00:06:39,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:39,337 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:39,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-25 00:06:39,338 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:39,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:39,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1765693168, now seen corresponding path program 24 times [2020-09-25 00:06:39,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:39,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027167358] [2020-09-25 00:06:39,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:39,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:40,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:40,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:40,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking...